Laravel 从集合中获取值
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Laravel get values from collection
提问by user947668
If collection is created from an array:
如果集合是从数组创建的：
$collection = collect();
$collection->push([
'var1'=>'value1',
'var2'=>'value2'
]);
is there possibility to get value for specific key similar way to eloquent collection attributes?
是否有可能以类似于雄辩的集合属性的方式获取特定键的值？
$collection->var1
回答by Ivakhnenko Aleksey
My variant:
我的变种：
$collection = collect();
$collection->push([
'var1'=>'value1',
'var2'=>'value2'
]);
$value = $collection->get('var1'); // value1
回答by prateekkathal
No, but you can definitely do something like
不，但你绝对可以做类似的事情
$collection->first(function($value, $key) {
return $key == 'var1';
});
or simply what @AlexeyMezenin suggested.
或者只是@AlexeyMezenin 建议的内容。
$collection[0]['var1'];
回答by Birdy
My personal touch though I am still learning the basics myself so don't shoot me down for trying! I know its a little extra code but from experience you can get caught out with offset exception errors when calling $collection[0]explicitly (Hope I am making sense as this has been a personal gotcha experience)
虽然我自己仍在学习基础知识，但我的个人风格所以不要因为我的尝试而失望！我知道它有一些额外的代码，但是根据经验，在$collection[0]显式调用时，您可能会遇到偏移异常错误（希望我说得通，因为这是个人问题）
My approach would be the following
我的方法如下
$collection = collect();
$collection->push([
'var1'=>'value1',
'var2'=>'value2'
]);
for ($x = 0; $x < count($collection); $x++) {
if (isset($collection[$x])) {
$var = $collection[$x];
}
}
// Now call what ever variable from the collection you wish:
echo $var['var1'];
echo $var['var2'];
Hope that helps, Like I said though I am far from experienced with php/laravel and I am still learning from research myself :)
希望能有所帮助，就像我说的，虽然我对 php/laravel 的经验还很远，但我自己仍在从研究中学习:)
回答by DevOverlord
To set a key'd value in a collection you can use the put()method.
要在集合中设置键的值，您可以使用该put()方法。
$collection = collect();
$collection->put("var1", "value1");
$collection->put("var2", "value2");
$collection->put("var3", "value3");
To push just a value without a key to the collection, use the push()method, like you did in the OP.
要将没有键的值推送到集合，请使用该push()方法，就像您在 OP 中所做的那样。
$collection->push("value4");
To retrieve those value, use get()method;
要检索这些值，请使用get()方法；
$collection->get("var2");
Want to see the contents of the collection? Use the dd()method on the collections instances. Both of the following work.
想看合集的内容吗？dd()在集合实例上使用该方法。以下两项工作。
dd($collection)
or
或者
$collection->dd()
