I have an array that looks like:
Array ( [2.5] => ABDE [4.8] => Some other value )
How would I find any key/value pair where the key matches a pattern? I will know the value of the first digit in the key,but not the second. so for example, using a prefix of “2.”, I want to somehow be able to find the key “2.5” and return both the key and the value “ABDE”.
I was thinking about using a regular expression with a pattern like:
$prefix = 2; $pattern = '/'.$prefix.'.d/i';
and then looping through the array and checking each key. (by the way, just for demo purposes, $prefix has been hardcoded to 2, but in the real system, this is a value provided by the user’s input).
I’m wondering if there’s a simpler way to do this?
Thanks.
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Answer
you can simply loop through the array and check the keys
$array = array(...your values...); foreach($array as $key => $value) { if (preg_match($pattern,$key)){ // it matches } }
You can wrap it in a function and pass your pattern as parameter