1:
function getExt1($filename)
{
$arr = explode('.',$filename);
return array_pop($arr);;
}
2:
function getExt2($filename)
{
$ext = strrchr($filename,'.');
return $ext;
}
3:
function getExt3($filename)
{
$pos = strrpos($filename, '.');
$ext = substr($filename, $pos);
return $ext;
}
4:
function getExt4($filename)
{
$arr = pathinfo($filename);
$ext = $arr['extension'];
return $ext;
}
5:
function getExt4($filename)
{
$arr = pathinfo($filename);
$ext = $arr['extension'];
return $ext;
}
PHP——获取文件 扩展名的常用方法小结【五种方式】
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