PHP从多维数组中删除值

<?php
$array = array(
    'key1' => 'value1',
    'key2' => 'value2',
    'key3' => array(
        'subkey1' => 'subvalue1',
        'subkey2' => 'subvalue2'
    )
);

unset($array['key2']); // 删除一维数组中的值
unset($array['key3']['subkey1']); // 删除多维数组中的值

print_r($array);
?>

<?php
$array = array(
    'key1' => 'value1',
    'key2' => 'value2',
    'key3' => array(
        'subkey1' => 'subvalue1',
        'subkey2' => 'subvalue2'
    )
);

$array = array_filter($array, function($value) {
    return $value !== 'value2'; // 删除指定值
});

print_r($array);
?>

<?php
function removeValue(&$array, $value) {
    foreach ($array as $key => &$val) {
        if (is_array($val)) {
            removeValue($val, $value); // 递归调用
        } else {
            if ($val === $value) {
                unset($array[$key]); // 删除指定值
            }
        }
    }
}

$array = array(
    'key1' => 'value1',
    'key2' => 'value2',
    'key3' => array(
        'subkey1' => 'subvalue1',
        'subkey2' => 'subvalue2'
    )
);

removeValue($array, 'value2'); // 删除一维数组中的值
removeValue($array, 'subvalue1'); // 删除多维数组中的值

print_r($array);
?>