如何从数组中删除特定数量的元素

Question

我有一个函数，它从数组中删除元素：function remove_from_cart($prod_name,$price,$params,$count){    $cart = array(    "0"  => array (     'name' => 'Bolognese - Small (26cm)',    'params' => '',    'price' => '12'),    "1"  => array (     'name' => 'Bolognese - Small (26cm)',    'params' => '',    'price' => '12')    );    $prod_arr = array(    "name"=> $prod_name,    "params"=> $params,    "price" => $price);    $count  = count( array_keys( $cart, $prod_arr ));    while(($key = array_search($prod_arr, $cart)) !== false) {unset($cart[$key]);}    return array('cart' => $cart, 'count' => $count);}$rem = remove_from_cart('Bolognese - Small (26cm)', '12', $params, 1);//here is i want to remove just 1 of 2 elements如何修改此函数以设置我想从数组中删除的元素数量？谢谢！

Answer 1

您的示例和问题不太清楚，但您可以查看此解决方案：

<?php

function remove_from_cart($prod_name,$price,$params,$count)

{

    $cart = array(

    "0"  => array (

    'name' => 'Bolognese - Small (26cm)',

    'params' => '',

    'price' => '12'),

    "1"  => array (

    'name' => 'Bolognese - Small (26cm)',

    'params' => '',

    'price' => '12'),

    "2"  => array (

    'name' => 'Bolognese - Small (26cm)',

    'params' => '',

    'price' => '12')

    );

    $prod_arr = array(

    "name"=> $prod_name,

    "params"=> $params,

    "price" => $price);

    $i = 0;

    while(($key = array_search($prod_arr, $cart)) !== false && $i < $count) {unset($cart[$key]); $i++;}

    return array('cart' => $cart, 'count' => $count);

}

$params = '';

$rem = remove_from_cart('Bolognese - Small (26cm)', '12', $params, 1);

var_dump($rem);

这将返回两个元素，因为它们是 3 个元素，$count如果传递 2，则传递 1，它将返回 1 个元素：

结果为$rem = remove_from_cart('Bolognese - Small (26cm)', '12', $params, 1);：

array(2) { ["cart"]=> array(2) { [1]=> array(3) { ["name"]=> string(24) "Bolognese - Small (26cm)" ["params"]=> string(0) "" ["price"]=> string(2) "12" } [2]=> array(3) { ["name"]=> string(24) "Bolognese - Small (26cm)" ["params"]=> string(0) "" ["price"]=> string(2) "12" } } ["count"]=> int(1) }

结果为$rem = remove_from_cart('Bolognese - Small (26cm)', '12', $params, 2);：

array(2) { ["cart"]=> array(1) { [2]=> array(3) { ["name"]=> string(24) "Bolognese - Small (26cm)" ["params"]=> string(0) "" ["price"]=> string(2) "12" } } ["count"]=> int(2) }