如何在PHP中基于键删除数组元素（） _PHP基于键删除数组元素

给定一个数组(一维或多维), 任务是根据键值删除数组元素。
例子：

Input: Array ( [0] => 'G' [1] => 'E' [2] => 'E' [3] => 'K' [4] => 'S' ) Key = 2 Output: Array ( [0] => 'G' [1] => 'E' [3] => 'K' [4] => 'S' )

使用unset()函数:unset()函数用于从数组中删除元素。 unset函数用于销毁任何其他变量, 并以相同的方式删除数组的任何元素。此unset命令将数组键作为输入, 并从数组中删除该元素。删除后, 关联的键和值不会更改。
语法如下：

unset($variable)

参数：该函数接受单个参数变量。它是必填参数, 用于取消设置元素。
程序1：从一维数组中删除元素。

< ?php //PHP program to delete an array //element based on index//Declare arr variable //and initialize it $arr = array ( 'G' , 'E' , 'E' , 'K' , 'S' ); //Display the array element print_r( $arr ); //Use unset() function delete //elements unset( $arr [2]); //Display the array element print_r( $arr ); ?>

输出如下：

Array ( [0] => G [1] => E [2] => E [3] => K [4] => S ) Array ( [0] => G [1] => E [3] => K [4] => S )

程序2：从关联数组中删除一个元素。

< ?php //PHP program to creating two //dimensional associative array $marks = array ( //Ankit will act as key "Ankit" => array ( //Subject and marks are //the key value pair "C" => 95, "DCO" => 85, ), //Ram will act as key "Ram" => array ( //Subject and marks are //the key value pair "C" => 78, "DCO" => 98, ), //Anoop will act as key "Anoop" => array ( //Subject and marks are //the key value pair "C" => 88, "DCO" => 46, ), ); echo "Before delete the element < br> " ; //Display Results print_r( $marks ); //Use unset() function to //delete elements unset( $marks [ "Ram" ]); echo "After delete the element < br> " ; //Display Results print_r( $marks ); ?>

【如何在PHP中基于键删除数组元素（）】输出如下：

Before delete the element Array ( [Ankit] => Array ( [C] => 95 [DCO] => 85 )[Ram] => Array ( [C] => 78 [DCO] => 98 )[Anoop] => Array ( [C] => 88 [DCO] => 46 )) After delete the element Array ( [Ankit] => Array ( [C] => 95 [DCO] => 85 )[Anoop] => Array ( [C] => 88 [DCO] => 46 ))