我试图循环这个数组,但我仍然得到错误
我有一个这样的数组:
1 => ["name"=>"A", "related"=>[
["signal"=>"A1", "color"=>"green"],
["signal"=>"A2", "color"=>"lime"],
["signal"=>"A3","color"=>"yellowGreen"]
]]
2 => ["name"=>"B", "related"=>[
["signal"=>"B1", "color"=>"Red"],
["signal"=>"B2", "color"=>"Pink"]
]]
如何显示为-A:绿色、青柠色、黄色Greeb-B:红色,粉红色
这是我的代码,我已经尝试显示为以上格式
foreach($arr as $key => $value){
echo $value["name"];
foreach($value["related"] as $k){
echo $k["color"] . ",";
}
}
它抛出错误,这个数组没有$value["related"]索引。但它可以呼应$value["name"]???
谢谢!
找到如下解决方案:
$array = [1 => [
"name" => "A",
"related" => [
["signal" => "A1", "color" => "green"],
["signal" => "A2", "color" => "lime"],
["signal" => "A3", "color" => "yellowGreen"]
]
],
2 => ["name" => "B", "related" => [
["signal" => "B1", "color" => "Red"],
["signal" => "B2", "color" => "Pink"]
]]
];
foreach ($array as $ar) {
$new_arr = array_column($ar['related'], 'color');
$required_string = implode(', ', $new_arr);
echo $ar['name'].' : ' .$required_string;
echo "<br />";
}
对于PHP版本<5.5您可以使用以下解决方案:
foreach ($array as $ar) {
$new_arr = array_map(function ($value) {
return $value['color'];
}, $ar['related']);
$required_string = implode(', ', $new_arr);
echo $ar['name'].' : ' .$required_string;
echo "<br />";
}
有关foreach
循环的更多详细信息,请访问http://php.net/manual/en/control-structures.foreach.php