php pathinfo()函數

一.pathinfo()函數 

pathinfo()函數返回一個包含了文件信息的數組，數組中有四個元素，分別是dirname、basename、extension、filename。

舉例：

<?php

//pathinfo函數用法

$path = "/www/jbxue/images/logo.jpg";

$fileArr = pathinfo($path);

print_r($fileArr);

//輸出結果：Array ( [dirname] => /www/jbxue/images [basename] => logo.jpg [extension] => jpg [filename] => logo )

//根據數組的鍵名就能夠得到對應的鍵值

echo $fileArr['filename'];

//輸出結果：logo

echo $fileArr['extension'];

//輸出結果：jpg

?>

二.另外一種實現方法

function path_info($filepath)  

{  

    $path_parts = array();  

    $path_parts ['dirname'] = rtrim(substr($filepath, 0, strrpos($filepath, '/')),"/")."/";  

    $path_parts ['basename'] = ltrim(substr($filepath, strrpos($filepath, '/')),"/");  

    $path_parts ['extension'] = substr(strrchr($filepath, '.'), 1);  

    $path_parts ['filename'] = ltrim(substr($path_parts ['basename'], 0, strrpos($path_parts ['basename'], '.')),"/");  

    return $path_parts;

} 

$path=path_info("/www/jbxue/images/logo.jpg");

var_dump($path);