1 <html> 2 <body> 3 <?php 4 function relativePath($aPath, $bPath) { 5 $aArr = explode('/', $aPath); //explode函數用於切分字串,返回切分後的數組,此處用'/'切分字串 6 $bArr = explode('/', $bPath); 7 $aDiffToB = array_diff_assoc($aArr, $bArr); //array_diff_assoc()用於擷取A數組與B數組之間元素的差集,Key和Value都不相同視為不同元素,此處返回在A數組中且與B數組不相同的元素 8 $count = count($aDiffToB); 9 10 $path = '';11 for($i = 0; $i < $count - 1; $i++){12 $path .= '../'; 13 }14 15 $path .= implode('/', $aDiffToB); //implode()用於使用指定字串串連數組元素,此處返回用'/'串連數組元素後的字串16 17 return $path;18 }19 20 echo relativePath('/a/b/c/d/a.php', '/a/b/1/2/b.php');21 ?>22 </body>23 </html>
頁面輸出
. ./. ./c/d/a.php
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