php 去掉字符串的最后一个字符 及 截取

原字符串1,2,3,4,5,6, 

去掉最后一个字符",",最终结果为1,2,3,4,5,6 

代码如下: 
$str = "1,2,3,4,5,6,"; 
$newstr = substr($str,0,strlen($str)-1); 
echo $newstr; 
echo 1,2,3,4,5,6

系统自带的函数即可实现这样的效果,两种方法: 
substr($str, 0, -1)
//函数2
rtrim($str, ",")
 #############截取 摘取 之间的字符串#########
 
$str='> <span class="ib">test 23232</span></p> <h2 class="Colo';
preg_match_all('/class="ib">(.*?)</',$str,$ary);
print_r($ary);
 
function parseHeaders($requset){
   $resule =array();
   if (preg_match("/GET (.*) HTTP/",$requset,$match)) { $resule['reuqest'] = $match[1]; }
   if (preg_match("/Host: (.*)\r\n/",$requset,$match)) { $result['host'] = $match[1]; }
   if (preg_match("/Origin: (.*)\r\n/",$requset,$match)) { $result['origin'] = $match[1]; }
   if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/",$requset,$match)) { $result['key'] = $match[1]; }
   return $result;
}
 

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转载自wyqjx.iteye.com/blog/2333375
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