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add array type hinting

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@187031 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Nuno Lopes 2005-05-26 16:40:51 +00:00
parent 8b49b2e359
commit 784252b784
1 changed files with 23 additions and 6 deletions
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29
language/oop5/typehinting.xml
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@ -1,14 +1,15 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.2 $ -->
<!-- $Revision: 1.3 $ -->
<sect1 id="language.oop5.typehinting">
<title>Type Hinting</title>
<para>
PHP 5 introduces Type Hinting. Functions are now able to force parameters
to be objects by specifying the name of the class in the function prototype.
to be objects (by specifying the name of the class in the function
prototype) or arrays (since PHP 5.1).
</para>
<example>
<title>Type Hinting example</title>
<title>Type Hinting examples</title>
<programlisting role="php">
<![CDATA[
<?php
@ -23,6 +24,16 @@ class MyClass
public function test(OtherClass $otherclass) {
echo $otherclass->var;
}
/**
* Another test function
*
* First parameter must be an array
*/
public function test_array(array $input_array) {
print_r($input_array);
}
}
// Another example class
@ -54,6 +65,12 @@ $myclass->test(null);
// Works: Prints Hello World
$myclass->test($otherclass);
// Fatal Error: Argument 1 must be an array
$myclass->test_array('a string');
// Works: Prints the array
$myclass->test_array(array('a', 'b', 'c'));
?>
]]>
</programlisting>
@ -85,9 +102,9 @@ MyFunction($myclass);
</programlisting>
</example>
<para>
Type Hints can only be of the <type>object</type> type. Traditional
type hinting with <type>int</type> and <type>string</type> are not
supported.
Type Hints can only be of the <type>object</type> and <type>array</type>
(since PHP 5.1) type. Traditional type hinting with <type>int</type> and
<type>string</type> isn't supported.
</para>
</sect1>