str_ireplace 与 str_replace 区别在于不区分大小写就和
preg_replace("/%body%/", "black", "<body text=%BODY%>");
与
preg_replace("/%body%/i", "black", "<body text=%BODY%>");
的区别是一样的
preg_replace("/%body%/", "black", "<body text=%BODY%>");
与
preg_replace("/%body%/i", "black", "<body text=%BODY%>");
的区别是一样的
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2004 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 3.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/3_0.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | [email protected] so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Aidan Lister <[email protected]> |
// +----------------------------------------------------------------------+
//
// $Id: str_ireplace.php,v 1.18 2005/01/26 04:55:13 aidan Exp $
/**
* Replace str_ireplace()
*
* @category PHP
* @package PHP_Compat
* @link http://php.net/function.str_ireplace
* @author Aidan Lister <[email protected]>
* @version $Revision: 1.18 $
* @since PHP 5
* @require PHP 4.0.0 (user_error)
* @note count not by returned by reference, to enable
* change '$count = null' to '&$count'
*/
if (!function_exists('str_ireplace')) {
function str_ireplace($search, $replace, $subject, $count = null)
{
// Sanity check
if (is_string($search) && is_array($replace)) {
user_error('Array to string conversion', E_USER_NOTICE);
$replace = (string) $replace;
} // If search isn't an array, make it one
if (!is_array($search)) {
$search = array ($search);
}
$search = array_values($search); // If replace isn't an array, make it one, and pad it to the length of search
if (!is_array($replace)) {
$replace_string = $replace; $replace = array ();
for ($i = 0, $c = count($search); $i < $c; $i++) {
$replace[$i] = $replace_string;
}
}
$replace = array_values($replace); // Check the replace array is padded to the correct length
$length_replace = count($replace);
$length_search = count($search);
if ($length_replace < $length_search) {
for ($i = $length_replace; $i < $length_search; $i++) {
$replace[$i] = '';
}
} // If subject is not an array, make it one
$was_array = false;
if (!is_array($subject)) {
$was_array = true;
$subject = array ($subject);
} // Loop through each subject
$count = 0;
foreach ($subject as $subject_key => $subject_value) {
// Loop through each search
foreach ($search as $search_key => $search_value) {
// Split the array into segments, in between each part is our search
$segments = explode(strtolower($search_value), strtolower($subject_value)); // The number of replacements done is the number of segments minus the first
$count += count($segments) - 1;
$pos = 0; // Loop through each segment
foreach ($segments as $segment_key => $segment_value) {
// Replace the lowercase segments with the upper case versions
$segments[$segment_key] = substr($subject_value, $pos, strlen($segment_value));
// Increase the position relative to the initial string
$pos += strlen($segment_value) + strlen($search_value);
} // Put our original string back together
$subject_value = implode($replace[$search_key], $segments);
} $result[$subject_key] = $subject_value;
} // Check if subject was initially a string and return it as a string
if ($was_array === true) {
return $result[0];
} // Otherwise, just return the array
return $result;
}
}?>
Provides missing functionality for older versions of PHP