php - 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！

标签： phparrays

Answer 1

你的例子和问题不是很清楚，但你可以检查这个解决方案：

<?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，并且您传递 1，因为$count如果您传递 2，它将返回 1 个元素：

结果$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$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) }