How Can I Efficiently Convert a Comma-Separated Key=Value String into an Associative Array?

Converting a Comma-Separated String of Key=Value Expressions into an Associative Array

Parsing comma-separated string of key-value pairs into an associative array can be a tedious task. While the suggested method of using explode() and foreach may be straightforward, it can be inefficient for larger strings.

A More Efficient Approach Using Regular Expressions

A more elegant and efficient solution is to leverage regular expressions:

$str = "key=value, key2=value2";
preg_match_all("/([^,= ]+)=([^,= ]+)/", $str, $r); 
$result = array_combine($r[1], $r[2]);
var_dump($result);

This approach uses the preg_match_all() function to extract all matches of the key-value pairs using the regex pattern ([^,= ] )=([^,= ] ). The resulting matches are stored in the $r array with the keys stored in $r[1] and the values in $r[2]. Finally, the array_combine() function combines the keys and values to create the desired associative array.

The example string provided in the question would result in the following associative array:

array(
  "key" => "value",
  "key2" => "value2"
)

This method offers a concise and performant solution for parsing comma-separated key-value strings.

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