mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-16 00:48:54 +00:00
Added <?php ?> to PHP code.
Added ?> <?php to HTML code (until role="HTML" exists). Changed $Count to $count in setcookie example. git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@87068 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Philip Olson
parent
bde354d7af
commit
f3cc504884
1 changed files with 46 additions and 52 deletions
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@ -1,5 +1,5 @@
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<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.50 $ -->
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<!-- $Revision: 1.51 $ -->
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<chapter id="language.variables">
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<title>Variables</title>
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@ -30,6 +30,7 @@
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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$var = "Bob";
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$Var = "Joe";
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echo "$var, $Var"; // outputs "Bob, Joe"
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@ -37,6 +38,7 @@ echo "$var, $Var"; // outputs "Bob, Joe"
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$4site = 'not yet'; // invalid; starts with a number
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$_4site = 'not yet'; // valid; starts with an underscore
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$täyte = 'mansikka'; // valid; 'ä' is ASCII 228.
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -285,8 +287,10 @@ $bar = &test(); // Invalid.
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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$a = 1;
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include "b.inc";
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -301,6 +305,7 @@ include "b.inc";
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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$a = 1; /* global scope */
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function Test()
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@ -309,6 +314,7 @@ function Test()
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}
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Test();
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -329,6 +335,7 @@ Test();
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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$a = 1;
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$b = 2;
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@ -341,6 +348,7 @@ function Sum()
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Sum();
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echo $b;
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -362,6 +370,7 @@ echo $b;
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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$a = 1;
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$b = 2;
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@ -372,6 +381,7 @@ function Sum()
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Sum();
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echo $b;
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -393,12 +403,14 @@ echo $b;
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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function Test ()
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{
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$a = 0;
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echo $a;
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$a++;
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}
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -416,12 +428,14 @@ function Test ()
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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function Test()
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{
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static $a = 0;
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echo $a;
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$a++;
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}
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -444,6 +458,7 @@ function Test()
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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function Test()
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{
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static $count = 0;
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@ -455,54 +470,7 @@ function Test()
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}
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$count--;
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}
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]]>
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</programlisting>
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</informalexample>
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<simpara>
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Static initializers are evaluated when a function is defined, not
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when it is executed. Thus you cannot make reference to any other
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variables or initialize a static variable with the result of a
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function call. The following example suggests a way around this:
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</simpara>
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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function Test()
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{
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static $magic_quotes_initialized = false;
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static $magic_quotes;
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if (!$magic_quotes_initialized) {
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$magic_quotes = get_magic_quotes_gpc();
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$magic_quotes_initialized = true;
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}
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// function body
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}
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]]>
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</programlisting>
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</informalexample>
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<simpara>
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If the function you are calling has predictable return values, for
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example, if it can never return <literal>null</literal>, this
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can be further simplified (note the use of the identity operator
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<literal>===</literal>):
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</simpara>
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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function Test()
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{
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static $magic_quotes = null;
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if ($magic_quotes === null) {
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$magic_quotes = get_magic_quotes_gpc();
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}
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// function body
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}
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -519,6 +487,7 @@ function Test()
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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function test_global_ref() {
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global $obj;
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$obj = &new stdclass;
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@ -533,6 +502,7 @@ test_global_ref();
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var_dump($obj);
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test_global_noref();
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var_dump($obj);
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -555,6 +525,7 @@ object(stdClass)(0) {
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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function &get_instance_ref() {
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static $obj;
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@ -586,6 +557,7 @@ $still_obj1 = get_instance_ref();
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echo "\n";
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$obj2 = get_instance_noref();
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$still_obj2 = get_instance_noref();
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -626,7 +598,9 @@ Static object: object(stdClass)(1) {
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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$a = "hello";
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -641,7 +615,9 @@ $a = "hello";
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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$$a = "world";
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -656,7 +632,9 @@ $$a = "world";
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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echo "$a ${$a}";
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -668,7 +646,9 @@ echo "$a ${$a}";
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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echo "$a $hello";
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -726,10 +706,12 @@ echo "$a $hello";
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<title>Simple form variable</title>
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<programlisting role="php">
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<![CDATA[
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?>
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<form action="foo.php" method="post">
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Name: <input type="text" name="username"><br>
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<input type="submit">
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</form>
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<?php
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]]>
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</programlisting>
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</example>
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@ -767,6 +749,7 @@ echo "$a $hello";
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<title>More complex form variables</title>
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<programlisting role="php">
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<![CDATA[
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?>
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<form action="array.php" method="post">
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Name: <input type="text" name="personal[name]"><br>
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Email: <input type="text" name="personal[email]"><br>
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@ -778,6 +761,7 @@ echo "$a $hello";
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</select>
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<input type="submit">
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</form>
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<?php
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]]>
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</programlisting>
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</example>
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@ -798,7 +782,9 @@ echo "$a $hello";
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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?>
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<input type="image" src="image.gif" name="sub">
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<?php
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]]>
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</programlisting>
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</informalexample>
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@ -840,7 +826,9 @@ echo "$a $hello";
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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setcookie("MyCookie[]", "Testing", time()+3600);
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -856,9 +844,11 @@ setcookie("MyCookie[]", "Testing", time()+3600);
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<title>SetCookie Example</title>
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<programlisting role="php">
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<![CDATA[
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$Count++;
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setcookie("Count", $Count, time()+3600);
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setcookie("Cart[$Count]", $item, time()+3600);
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<?php
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$count++;
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setcookie("Count", $count, time()+3600);
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setcookie("Cart[$count]", $item, time()+3600);
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?>
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]]>
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</programlisting>
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</example>
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@ -875,7 +865,9 @@ setcookie("Cart[$Count]", $item, time()+3600);
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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echo $HOME; /* Shows the HOME environment variable, if set. */
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?>
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]]>
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</programlisting>
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</informalexample>
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@ -902,7 +894,9 @@ echo $HOME; /* Shows the HOME environment variable, if set. */
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variable name. For the reason, look at it:
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<programlisting role="php">
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<![CDATA[
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<?php
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$varname.ext; /* invalid variable name */
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?>
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]]>
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</programlisting>
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Now, what the parser sees is a variable named
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