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PHP如何删除第一行的空行

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Release： 2016-06-13 12:17:46
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PHP怎么删除第一行的空行
$_POST = preg_replace("/(\n\s*\r)/i", '', $_POST);


这样做不行
$_POST['vod_url_1'] 的值是

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今天开始我爱你01$227703131
今天开始我爱你02$227771999
今天开始我爱你03$227863744
今天开始我爱你04无字$227909342

------解决思路----------------------
[\n\s\r]+

你 (\n\s*\r) 不行的原因是：\n 必须要在 \r 前面出现。而 windows 中 \r 总是在 \n 前面
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