php：循环遍历 json 数组
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php: loop through json array
提问by superUntitled
I have a json array:
我有一个 json 数组：
[
{
"var1": "9",
"var2": "16",
"var3": "16"
},
{
"var1": "8",
"var2": "15",
"var3": "15"
}
]
How can I loop through this array using php?
如何使用 php 遍历这个数组？
回答by chustar
Decode the JSON string using json_decode()and then loop through it using a regular loop:
使用解码 JSON 字符串json_decode()，然后使用常规循环遍历它：
$arr = json_decode('[{"var1":"9","var2":"16","var3":"16"},{"var1":"8","var2":"15","var3":"15"}]');
foreach($arr as $item) { //foreach element in $arr
$uses = $item['var1']; //etc
}
回答by Scuzzy
Set the second function parameter to true if you require an associative array
如果需要关联数组，请将第二个函数参数设置为 true
Some versions of php require a 2nd paramter of true if you require an associative array
如果需要关联数组，某些版本的 php 需要第二个参数为 true
$json = '[{"var1":"9","var2":"16","var3":"16"},{"var1":"8","var2":"15","var3":"15"}]';
$array = json_decode( $json, true );
回答by Lucas Costa oliveira
First you have to decode your json :
首先你必须解码你的 json ：
$array = json_decode($the_json_code);
Then after the json decoded you have to do the foreach
然后在json解码后你必须做foreach
foreach ($array as $key => $jsons) { // This will search in the 2 jsons
foreach($jsons as $key => $value) {
echo $value; // This will show jsut the value f each key like "var1" will print 9
// And then goes print 16,16,8 ...
}
}
If you want something specific just ask for a key like this. Put this between the last foreach.
如果您想要特定的东西，只需要求这样的钥匙即可。把它放在最后一个 foreach 之间。
if($key == 'var1'){
echo $value;
}
回答by lonesomeday
Use json_decodeto convert the JSON string to a PHP array, then use normal PHP array functions on it.
使用json_decode的JSON字符串转换为一个PHP数组，然后就可以正常使用PHP阵列功能。
$json = '[{"var1":"9","var2":"16","var3":"16"},{"var1":"8","var2":"15","var3":"15"}]';
$data = json_decode($json);
var_dump($data[0]['var1']); // outputs '9'
