二级索引的字符串关联数组最低值

本文介绍了二级索引的字符串关联数组最低值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有这样的关联数组，我想获得价格的那些阵列的最低值

阵列（大小= 3）  0 =＆GT;    阵列（大小= 21）      量= GT; INT 6      '的product_id =＆GT; INT 3      CATEGORY_ID'=＆GT;串'2'（长度= 1）      '价格'=＆GT;浮18.73  1 =＆GT;    阵列（大小= 21）      量= GT;诠释21      '的product_id =＆GT; INT 6      CATEGORY_ID'=＆GT;串1（长度= 1）      '价格'=＆GT;浮动0.26  2 =＆GT;    阵列（大小= 21）      量= GT;诠释34      '的product_id =＆GT; INT 6      CATEGORY_ID'=＆GT;串1（长度= 1）      '价格'=＆GT;浮动0.63

我曾尝试

的foreach（$产品为$ KEY_ID =＆GT; $ PROD）{    最低$ = $督促['价格'];    如果（$ PROD ['价格'＆LT; $最低）{        //在这里做什么    }}

我想以最低的价格和它的的product_id 太，像

产品

的product_id =＆GT; 6，价格= GT; 0.26

解决方案

在PHP> = 5.5

$分钟=分钟（array_column（$产品，'价格'））;

在PHP> = 5.3（由deceze建议）

$分钟=分钟（array_map（函数（数组$产品）{$收益产品['价格'];} $产品））;

在PHP> = 5.0

$价格=阵列（）;的foreach（$产品为$产品）{  $价格[] = $产品['价格'];}$分= MIN（$价格）;

修改

要找到两者的product_id，你可以这样做：

$分钟= PHP_INT_MAX;$的product_id = 0;的foreach（$产品为$产品）{  如果（$产品['价格'＆LT; $分钟）{    $的product_id = $产品['PRODUCT_ID'];    $分= $产品['价格'];  }}

阵列列手册页结果分钟手册页结果 array_map手册页结果匿名函数手册页

I have this associative array, I want to get price's lowest value from those arrays

array (size=3) 0 => array (size=21) 'quantity' => int 6 'product_id' => int 3 'category_id' => string '2' (length=1) 'price' => float 18.73 1 => array (size=21) 'quantity' => int 21 'product_id' => int 6 'category_id' => string '1' (length=1) 'price' => float 0.26 2=> array (size=21) 'quantity' => int 34 'product_id' => int 6 'category_id' => string '1' (length=1) 'price' => float 0.63

I have tried

foreach ($products as $key_id => $prod) { $lowest = $prod['price']; if($prod['price'] < $lowest) { // what to do here } }

I want to get product with lowest price and its product_id too, something like

product_id => 6 , price => 0.26

解决方案

In php >= 5.5

$min = min(array_column($products, 'price'));

In php >= 5.3(suggested by deceze)

$min = min(array_map(function (array $product) { return $product['price']; }, $products));

In php >= 5.0

$prices = array(); foreach ($products as $product) { $prices[] = $product['price']; } $min = min($prices);

EDIT

To find both product_id and you could use this:

$min = PHP_INT_MAX; $product_id = 0; foreach ($products as $product) { if ($product['price'] < $min) { $product_id = $product['product_id']; $min = $product['price']; } }

array column manual page min manual page array_map manual page anonymous functions manual page