CODEWITHSUNDEEP
phpregexpcre
Jamex
Jamex

Reputation: 79

Correct syntax for matching a string inside a variable against an array

I have a variable, $var, that contains a string of characters, this is a dynamic variable that contains the values from inputs.

$var could be 'abc', or $var could be 'blu',

I want to match the string inside variable against an array, and return all the matches.

$array = array("blue", "red", "green");

What is the correct syntax for writing the code in php, my rough code is below

$match = preg_grep($var, $array); (incorrect syntax of course)

I tried to put quotes and escape slashes, but so far no luck. Any suggestion?

TIA

Upvotes: 2

Views: 134

Answers (2)

Felix Kling
Felix Kling

Reputation: 816810

Try

$match = preg_grep('/' . $var . '/', $array);

Patterns for PCREs must be enclosed in delimiters.

Of course you have to adjust the pattern, depending on your needs. E.g. if you want to match all strings in the array that start with the string in $var you have to change it to:

$match = preg_grep('/^' . $var . '/', $array);

And so on...

Upvotes: 2

Mark Baker
Mark Baker

Reputation: 212452

$var = 're';

$array = array("blue", "red", "green");

$pattern = '/'.$var.'/';

$matches = preg_grep($pattern, $array);

echo '<pre>';
var_dump($matches);
echo '<pre>';

returns

array(2) {
  [1]=>
  string(3) "red"
  [2]=>
  string(5) "green"
}

Upvotes: 1

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