How to write a regex pattern which matches following Array? - php

Question

I want to write a regex pattern that user enters values matches the any one of the index in the following array ,can you please help me to achieve this thing...
$cars=['bmw','Audi','Ferari','BenZ',];
$regex_pattern=^[A-Za-z]+(?: [A-Za-z]+)*$; //it takes the value only string with space or without space,now i want to match the pattern with the given array values .
if(preg_match($regex_pattern,$request->search)){
my logic
}
InvalidScenarios:
Flight
Ship
Valid-Scenarios:
bmw
Audi
Ferari
Benz

Answer 1

$cars=['bmw','Audi','Ferari','BenZ',];
$regex_pattern=^[A-Za-z ]+$; //it takes the value only string with space or without space,now i want to match the pattern with the given array values .
if(preg_match($regex_pattern,$request->search)){
my logic
}

Answer 2

you can use
$matches = preg_grep ('/^ship (\w+)/i', $cars);
Output : []
$matches = preg_grep ('/^bmw (\w+)/i', $cars);
Output : [ 0 => 'bmw' ];
It will return array of values matched.
You can check for $matches if it is an empty array that means you don't have any match.
Reference : https://www.php.net/manual/en/function.preg-grep.php

Answer 3

You could write a dynamic pattern to assert for the word in the string, and then use your regex to match only the allowed characters.
$cars=['bmw','Audi','Ferari','BenZ'];
$str = 'bmw
Audi
Ferari
Benz
Flight
Ship';
$regex_pattern = sprintf
("/^(?=.*\b(?:%s)\b)[A-Za-z]+(?: [A-Za-z]+)*$/im",
implode('|', $cars)
);
preg_match_all($regex_pattern, $str, $matches);
var_dump($matches[0]);
Output
array(4) {
[0]=>
string(3) "bmw"
[1]=>
string(4) "Audi"
[2]=>
string(6) "Ferari"
[3]=>
string(4) "Benz"
}