求大神帮助,关于正则表达式的
$str = "fsafsaf<{0}>54a<{1}>u7ygda<{2}>kklaoda<{3}>"; $char = array('a1','a2','a3','a4'); $pattern = '/<\{(\d*)\}>/'; $replacement = '$char[\\1]'; $newstr = preg_replace($pattern,$replacement,$str); echo $newstr;
我想把$str 里面的依次替换为 $char数组对应下标的值,可按我上面的代码来做替换之后输出了 fsafsaf$char[0]54a$char[1]u7ygda$char[2]kklaoda$char[3] ,没有取到值,在这个问题上卡主了,跪求指点。。
回复讨论(解决方案)
$pattern = '// e';
$pattern = '// e';
非常感谢,这样写可以了,可以问下加个 e 代表什么意思吗
eval 计算表达式串
eval 计算表达式串
明白了,再次感谢!!

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