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$string = 'The quick brown fox jumps over the lazy dog.';$patterns = array();$patterns[0] = '/quick/';$patterns[1] = '/brown/';$patterns[2] = '/fox/';$replacements = array();$replacements[2] = 'bear';$replacements[1] = 'black';$replacements[0] = 'slow';echo preg_replace($patterns, $replacements, $string);?>
<?php$string = 'April 15, 2003';$pattern = '/(w+) (d+), (d+)/i';$replacement = '${1}1,$3';echo preg_replace($pattern, $replacement, $string);?>
