php怎么替换中文,PHP如何使用正则替换中文？

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);

?>

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