Question

这是我的宝座

<?php 
    foreach ($_productCollection as $_product){
        echo "<PRE>";
        print_r($_product->getData());
    } 

    ?>

foreach数组输出：-

Array
(
    [entity_id] => 85
    [name] => Round Bur

)
Array
(
    [entity_id] => 86
    [name] => testile Bur

)
Array
(
    [entity_id] => 87
    [name] => Shovel

)
Array
(
    [entity_id] => 88
    [name] => Round Bur

)

例如，我想在foreach下删除相同的名称数组

实际输出

Array
(
    [entity_id] => 85
    [name] => Round Bur

)
Array
(
    [entity_id] => 86
    [name] => testile Bur

)
Array
(
    [entity_id] => 87
    [name] => Shovel

)

由于相同的名称，如何删除最后1个数组。请给我一个解决方案

Answer 1

您可以将所有结果放入一个数组中，仅在name不存在的情况下添加它们：

$products = array();
foreach ($_productCollection as $_product){
    $product = $_product->getData();
    if (!in_array($product['name'], array_column($products, 'name'))) {
        $products[] = $product;
    }
} 
echo "<PRE>";
print_r($products);

Answer 2

您可以拼接包含相同值的重复行：

$res_ar = [];     // resultant array
$ar_names = [];   // array of unique names 

foreach($ar as $ind => $row){
    if (in_array($row['name'],$ar_names)){   // if name was before
        array_splice($ar,$ind,1);            // remove element by its index
    } else {
        $ar_names[] = $row['name'];          // add new name to the unique array of names
        $res_ar[] = $row;                    // saving row with new name value
    }
}

Demo

您的案例的执行如下：

$res_ar = [];
$ar_names = [];

foreach ($_productCollection as $ind => $_product){

       $row = (array)$_product->getData();

       if (in_array($row['name'], $ar_names)){
           array_splice($_productCollection,$ind,1);
       } else {
           $ar_names[] = $row['name'];
           $res_ar[] = $_product;
       } 
}

Answer 3

最后一个版本，只需跟踪添加的名称，还可以将原始名称添加到输出中，而不是数据数组中。

$output = [];
$existingNames = [];
foreach ($_productCollection as $product){
    $productName = $product->getData()['name'];
    if ( !isset($existingNames[$productName]))  {
        $existingNames[$productName] = true;
        $output[] = $product;
    }
}

删除同名数组

3 个答案: