您好,欢迎访问一九零五行业门户网

preg_replace - php中怎么把变量中隐藏的变量解析出来?

$a = #0 and #1 or (#0);$items = array( a>1, b>0);$str = preg_replace(/#(\w+)/,\$items[$1],$a);echo $str;

输出结果: $items[0] and $items[1] or ($items[0])
怎么才能让输出结果是:a>1 and b>0 or (a>1)?
请各位大神帮忙看一下,谢谢!
回复内容: $a = #0 and #1 or (#0);$items = array( a>1, b>0);$str = preg_replace(/#(\w+)/,\$items[$1],$a);echo $str;

输出结果: $items[0] and $items[1] or ($items[0])
怎么才能让输出结果是:a>1 and b>0 or (a>1)?
请各位大神帮忙看一下,谢谢!
正则
$items = [ 'a > 1', 'b > 0', 'abc' => 'c > 1'];$subject = '#0 and #1 or (#0) and #abc #nooo';echo preg_replace_callback('/#([a-z0-9_]+)/i', function($v) use ($items){ return isset($items[$v[1]]) ? $items[$v[1]] : $v[0];}, $subject);
a > 1 and b > 0 or (a > 1) and c > 1 #nooo
其它类似信息

推荐信息