php正则实现替换电话的方法：1、创建一个PHP示例文件；2、通过“preg_replace($pattern, $replacement,$str);”替换电话中间四位数字即可。
本文操作环境：Windows7系统，PHP7.1版，Dell G3电脑。
php正则怎么实现替换电话？
php手机号正则替换中间四位
php手机号正则替换中间四位代码如下：
$str = '13525462555';
$pattern = '/(\d{3})(\d{4})(\d{4})/i';
$replacement = '$1****$3';
$resstr = preg_replace($pattern, $replacement,$str);
echo $resstr效果如下：
183****3322
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