How to use regular expressions to replace Chinese characters in PHP?

PHP如何使用正则替换中文？

在PHP中可以使用函数“preg_replace()”进行正则替换，其匹配中文的正则为“/^[\x{4e00}-\x{9fa5}A-Za-z0-9_]+$/u”，使用时只需将正则、替换字符、字符串依次传入即可。

preg_replace 函数语法

preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] ) : mixed

使用示例

<?php
$string = &#39;The quick brown fox jumps over the lazy dog.&#39;;
$patterns = array();
$patterns[0] = &#39;/quick/&#39;;
$patterns[1] = &#39;/brown/&#39;;
$patterns[2] = &#39;/fox/&#39;;
$replacements = array();
$replacements[2] = &#39;bear&#39;;
$replacements[1] = &#39;black&#39;;
$replacements[0] = &#39;slow&#39;;
echo preg_replace($patterns, $replacements, $string);
?>

<?php
$string = &#39;April 15, 2003&#39;;
$pattern = &#39;/(\w+) (\d+), (\d+)/i&#39;;
$replacement = &#39;${1}1,$3&#39;;
echo preg_replace($pattern, $replacement, $string);
?>

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