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Clarify the feature of "character sequences", and caution that numeric strings

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are seen as strings and not integers prior to PHP 4.3.3, so used as character sequences.
This documents bug #24420


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@132976 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Philip Olson 2003-06-22 23:17:14 +00:00
parent b01743266b
commit fa4f1efb88
1 changed files with 17 additions and 7 deletions
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24
reference/array/functions/range.xml
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@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.8 $ -->
<!-- $Revision: 1.9 $ -->
<!-- splitted from ./en/functions/array.xml, last change in rev 1.2 -->
<refentry id="function.range">
<refnamediv>
@ -39,8 +39,8 @@
<programlisting role="php">
<![CDATA[
<?php
// array(0,1,2,3,4,5,6,7,8,9)
foreach(range(0, 9) as $number) {
// array(0,1,2,3,4,5,6,7,8,9,10,11,12)
foreach(range(0, 12) as $number) {
echo $number;
}
@ -50,7 +50,7 @@ foreach(range(0, 100, 10) as $number) {
echo $number;
}
// Use of characters introduced in 4.1.0
// Use of character sequences introduced in 4.1.0
// array('a','b','c','d','e','f','g','h','i');
foreach(range('a', 'i') as $letter) {
echo $letter;
@ -66,11 +66,21 @@ foreach(range('c', 'a') as $letter) {
</para>
<note>
<para>
Prior to version 4.1.0 the <function>range</function> function
only generated incrementing integer arrays. Support for
character sequences and decrementing arrays was added in 4.1.0.
Prior to PHP version 4.1.0, <function>range</function> only generated
incrementing integer arrays. Support for character sequences and
decrementing arrays was added in 4.1.0. Character sequence values
are limited to a length of one. If a length greater than one is
entered, only the first character is used.
</para>
</note>
<caution>
<para>
In PHP versions 4.1.0 through 4.3.2, <function>range</function> sees
numeric strings as strings and not integers. Instead, they will be
used for character sequences. For example, <literal>"4242"</literal>
is treated as <literal>"4"</literal>.
</para>
</caution>
<para>
See also <function>shuffle</function> and
<link linkend="control-structures.foreach">foreach</link>.