排序怪陣由數

Question

它我的數組：

$hello = Array(
[text] => Array([name] => blabla [num] => 10) 
[sometext] => Array([name] => blabla [num] => 2) 
[anytext] => Array([name] => blabla [num] => 1) 
) 

如何這個數組由[num]排序？

應該看起來像（回聲）：

<ul> 
    <li>anytext</li> 
    <li>sometext</li> 
    <li>text</li> 
</ul> 

感謝。

Answer 1

使用uasort()：

<?php 
$hello = array(
    'text' => array('name' => 'blabla', 'num' => 10), 
    'sometext' => array('name' => 'blabla', 'num' => 2), 
    'anytext' => array('name' => 'blabla', 'num' => 1) 
); 

function sort_func($x, $y) { // our custom sorting function 
    if($x['num'] == $y['num']) 
    return 0; // zero return value means that the two are equal 
    else if($x['num'] < $y['num']) 
    return -1; // negative return value means that $x is less than $y 
    else 
    return 1; // positive return value means that $x is more than $y 
} 

uasort($hello, 'sort_func'); 

echo '<ul>'; 
foreach($hello as $key => $value) 
{ 
    echo '<li>'.htmlspecialchars($key).'</li>'; 
} 
echo '</ul>'; 

Answer 2

uasort是你在找什麼。

function cmp($a, $b) { 
    if ($a['num'] == $b['num']) { 
     return 0; 
    } 
    return ($a['num'] < $b['num']) ? -1 : 1; 
} 

uasort($hello, 'cmp');