(PHP 4, PHP 5)
key — 从关联数组中取得键名
key() 返回数组中当前单元的键名。
Example#1 key() 例子
<?php
$array = array(
'fruit1' => 'apple' ,
'fruit2' => 'orange' ,
'fruit3' => 'grape' ,
'fruit4' => 'apple' ,
'fruit5' => 'apple' );
// this cycle echoes all associative array
// key where value equals "apple"
while ( $fruit_name = current ( $array )) {
if ( $fruit_name == 'apple' ) {
echo key ( $array ). '<br />' ;
}
next ( $array );
}
?> © 2005-2008 BlaBla.cn 版权所有