<?php
 
$string = "Color: black; Weight: 2.3 kg; Screen size: 15.6''; Screen resolution: 1366 x 768;";
$specs = array();
preg_match_all('/(.*?):\s+(.*?); ?/i', $string, $matches, PREG_PATTERN_ORDER);
for ($i = 0; $i < count($matches[1]); $i++) {
	$specs[$matches[1][$i]] = $matches[2][$i];
}
//cret
function whatIsThe($item, $specs){
return $specs[$item];
}
 
echo whatIsThe("Color", $specs);
//black
echo whatIsThe("Screen resolution", $specs);
//black
 
//print_r($specs);

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