in_array函数的用法 in_array函数判断数组中是否存在M字符,下面我举个例子说明:
$ext = array('avi','wmv','asf','mov','rm','ra','ram','mp3','wma','swf');
if(in_array('mp3',$ext) ){
echo '存在';
}else{
echo '不存在';
}
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