function findLongestStringSize(array $strings): int {
$longestSize = 0;
foreach ($strings as $string) {
$stringSize = strlen($string);
if ($stringSize > $longestSize) {
$longestSize = $stringSize;
}
}
return $longestSize;
}
$strings = ["c++", "php", "python", "c#", "java", "swift"];
$longestSize = findLongestStringSize($strings);
echo "The longest string size is: $longestSize\n";
/*
run:
The longest string size is: 6
*/