PHP删除数组中指定值的元素

末蓝、 2022-12-13 01:58 148阅读 0赞

<?php
    
    function deleteByValue1($arr, $value)
    { 
        if (!is_array($arr)) { 
            return $arr;
        }
        foreach($arr as $k=>$v) { 
            /** * foreach遍历，删除数组中指定值的元素 */
            if ($v == $value) { 
                unset($arr[$k]);
            }
        }
        return $arr;
    }
    
    function deleteByValue2($arr, $value)
    { 
        // 使用array_flip()函数反转/交换数组中的键名和对应关联的键值
        $temp = array_flip($arr);
        // 删除键名值为指定值的元素
        unset($temp[$value]);
        return array_flip($temp);
    }
    
    function deleteByValue3($arr, $value)
    { 
        // array_search() 函数在数组中搜索某个键值，并返回对应的键名
        $key = array_search($value, $arr);
        if (isset($key)) { 
            unset($arr[$key]);
        }
        return $arr;
    }
    
    function deleteByValue4($arr, $value) { 
        // 返回指定值的所有键名，数组
        $keys = array_keys($arr, $value);
        if (!empty($keys)) { 
            foreach($keys as $key) { 
                unset($arr[$key]);
            }
        }
        return $arr;
    }
    
    $arr = array(
        't' => 'qq',
        'q' => 'qq',
        'b' => 'baidu',
        'a' => 'ali',
        'm' => 'xiaomi'
    );
    $arr1 = $arr2 = $arr3 = $arr4 = $arr;
    
    $test1 = deleteByValue1($arr1, 'baidu');
    print_r($test1);
    /** Array ( [t] => qq [q] => qq [a] => ali [m] => xiaomi ) */
    
    $test2 = deleteByValue2($arr2, 'baidu');
    print_r($test2);
    /** Array ( [q] => qq [a] => ali [m] => xiaomi ) */
    $test3 = deleteByValue3($arr3, 'baidu');
    print_r($test3);
    /** Array ( [t] => qq [q] => qq [a] => ali [m] => xiaomi ) */
    
    $test4 = deleteByValue4($arr4, 'baidu');
    print_r($test4);
    /** Array ( [t] => qq [q] => qq [a] => ali [m] => xiaomi ) */

--------------------

**原文链接：**  
[https://www.jb51.net/article/146022.htm][https_www.jb51.net_article_146022.htm]

[https_www.jb51.net_article_146022.htm]: https://www.jb51.net/article/146022.htm