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php 正则中运用函数的方式

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Release: 2016-06-13 10:40:44
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php 正则中使用函数的方式

//正则案例:使用php函数来改变字符值 $string = "April 15, 2003";  //注意:使用模式修正符 /e 其作用是将匹配结果用作表达式,须使用它才可以使用\\3这样模式变量 $pattern = "/(\w+) (\d+), (\d+)/e";  // 此处的模式变量\\2将被strtoupper转换为大写字符 : 注意函数当中用单引号连接 '字符串'.函数('模式变量').'字符串' $replacement = "'\\2'.strtoupper('\\1').'1,\\3'";  $s = preg_replace($pattern, $replacement, $string); echo $s;//输出 15APRIL1,2003 
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