- substr: documentation ( source)
- strpos: documentation ( source)
- trim: documentation ( source)
<?php
$css = " \n \n@charset \"UTF-8\";.container{width:980px;margin-left:auto;margin-right:auto;padding:0 1.container{width:980px;margin-left:auto;margin-right:auto;padding:0 1.container{width:980px;margin-left:auto;margin-right:auto;padding:0 1.container{width:980px;margin-left:auto;margin-right:auto;padding:0 1.container{width:980px;margin-left:auto;margin-right:auto;padding:0 1.container{width:980px;margin-left:auto;margin-right:auto;padding:0 1";
$charset = substr(trim($css),0,strpos($css,";"));
echo $charset;