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PHP获取文件扩展名的4种方法_PHP

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Release: 2016-05-29 11:47:47
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本文实例讲述了PHP获取文件扩展名的4种方法。分享给大家供大家参考,具体如下:

$filename="123.jpg";
//方法一:
function get_ext($file_name){
  return array_pop(explode('.', $file_name));
  //用.号对字符串进行分组
}
echo get_ext($filename);
//方法二:
$fileEx=strtolower(substr(strrchr($filename,"."),1));
echo $fileEx;
//方法三:
$extend=pathinfo($filename);
echo $extend['extension'];
//方法四:
$filetype=array("image/gif","image/jpeg");
//判断文件扩展名类型是否在该 数组中
if(in_array($_FILES['file']['type'],$filetype)){
//针对上传文件判断
  echo $_FILES['file']['type'];
}

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希望本文所述对大家PHP程序设计有所帮助。

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