PHP Foreach显示具有相同的值

$vendorid当我从不同供应商订购5个产品时,如何显示数据组.

例如:随机添加产品到购物车.

| $vendorid | $product_name |
-----------------------------
|     1     |    TEST31     |
|     4     |    TEST21     |
|     3     |    TEST20     |
|     3     |    TEST17     |
|     4     |    TEST11     |

但是我希望显示如下:

| $vendorid | $product_name |
-----------------------------
|     1     |    TEST31     |
|     3     |    TEST20     |
|     3     |    TEST17     |
|     4     |    TEST21     |
|     4     |    TEST11     |

代码:

foreach($_SESSION["products"] as $product){

    $product_name = $product["p_name"];
    $vendorid = $product["p_member_id"];        
    $cart_box = "
$vendorid $product_name
";
}
echo $cart_box;

这给了我一个与我添加到购物车中的结果相同的输出:

| $vendorid | $product_name |
-----------------------------
|     1     |    TEST31     |
|     4     |    TEST21     |
|     3     |    TEST20     |
|     3     |    TEST17     |
|     4     |    TEST11     |

VolkerK.. 5

1, 'product_name'=>'TEST31' ];
$_SESSION["products"][] = ['vendorid'=>4, 'product_name'=>'TEST21' ];
$_SESSION["products"][] = ['vendorid'=>3, 'product_name'=>'TEST20' ];
$_SESSION["products"][] = ['vendorid'=>3, 'product_name'=>'TEST17' ];
$_SESSION["products"][] = ['vendorid'=>4, 'product_name'=>'TEST11' ];

// actual code
usort($_SESSION["products"], function($a, $b) {
    return $a['vendorid'] - $b['vendorid'];
});

foreach( $_SESSION["products"] as $product ) {
    echo '
',
        htmlspecialchars($product['vendorid']), ' ', htmlspecialchars($product['product_name']),
    "
\r\n";
}

版画

1 TEST31
3 TEST17
3 TEST20
4 TEST11
4 TEST21

排序$_SESSION["products"]数组的位置和时间并不重要.
但是如果每次添加一个新项目时都这样做,那么每次显示购物车时都不需要这样做,如果(和什么时候)php获得了一些"sorted-insert-into-array"功能,你可以替换代码由此节省一些计算时间....

另见:http://docs.php.net/manual/en/function.usort.php

1, 'product_name'=>'TEST31' ];
$_SESSION["products"][] = ['vendorid'=>4, 'product_name'=>'TEST21' ];
$_SESSION["products"][] = ['vendorid'=>3, 'product_name'=>'TEST20' ];
$_SESSION["products"][] = ['vendorid'=>3, 'product_name'=>'TEST17' ];
$_SESSION["products"][] = ['vendorid'=>4, 'product_name'=>'TEST11' ];

// actual code
usort($_SESSION["products"], function($a, $b) {
    return $a['vendorid'] - $b['vendorid'];
});

foreach( $_SESSION["products"] as $product ) {
    echo '
',
        htmlspecialchars($product['vendorid']), ' ', htmlspecialchars($product['product_name']),
    "
\r\n";
}

版画

1 TEST31
3 TEST17
3 TEST20
4 TEST11
4 TEST21

排序$_SESSION["products"]数组的位置和时间并不重要.
但是如果每次添加一个新项目时都这样做,那么每次显示购物车时都不需要这样做,如果(和什么时候)php获得了一些"sorted-insert-into-array"功能,你可以替换代码由此节省一些计算时间....

另见:http://docs.php.net/manual/en/function.usort.php