How to simplify the code

{A: 1, B: 2, c: 3} is a string similar to this. If a is input, 1 is returned. If B is input, 2 is returned .. And so on. I wrote a code myself, but it looked too redundant. My idea is to write him into an array. Then return. For simpler code, {code...} {a: 1, B: 2, c: 3} is a string similar to this. If a is input, 1 is returned. If B is input, 2 is returned .. And so on.
I wrote a code myself, but it looked too redundant.
My idea is to write him into an array. Then return. For simpler code,

  "1","b"=>"2","c"=>"3") */$str="{a:1,b:2,c:3}";$search=array("{","}");$str=str_replace($search, "", $str);$arr=explode(",", $str);$arr1=array();for ($i=0;$i
  

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{A: 1, B: 2, c: 3} is a string similar to this. If a is input, 1 is returned. If B is input, 2 is returned .. And so on.
I wrote a code myself, but it looked too redundant.
My idea is to write him into an array. Then return. For simpler code,

   "1","b"=>"2","c"=>"3") */$str="{a:1,b:2,c:3}";$search=array("{","}");$str=str_replace($search, "", $str);$arr=explode(",", $str);$arr1=array();for ($i=0;$i
   

The example is too json, so it is certainly the best to make the source into a standard json.

It must be like this. Regular Expressions are easier to write.

$str="{a:1,b:2,c:3}";preg_match_all('/(\w+):(\d+)/', $str, $matches);$arr = array_combine($matches[1], $matches[2]);var_dump($arr);

$ Str = trim ("{a: 1, B: 2, c: 3}", '{}'); // trim: $ arr = explode (", ", $ str); $ arr1 = array (); for ($ I = 0, $ l = count ($ arr); $ I <$ l; $ I ++) {$ _ arr = explode (":", $ arr [$ I]); $ arr1 [$ _ arr [0] = $ _ arr [1];} print_r ($ arr1 );

To simplify it, modify your original string. Your original string is also json, but the format is not very good. The standard format is similar to {"a": 1, "B": 2, "c": 3}. php has strict requirements on json strings, while js is loose.
In this case, $ arr = json_decode ('{"a": 1, "B": 2, "c": 3}'); that is, a = 1, B = 2, c = 3 array.

Isn't the "string" JSON? Do you want to write a JSON parser?

function foo($str, $key){    $obj = json_decode($str, true);    return $obj[$key];}

This is not a json file. You can use the json_decode file in php to parse it.