Search Associative Array with Wildcard in PHP

Here are a pair of functions that will allow you to search an associative array for either a key or a value, using a string with a wildcard (*).

[source language=“php“]
function array_key_exists_wildcard ( $array, $search, $return = “ ) {
$search = str_replace( ‚\*‘, ‚.*?‘, preg_quote( $search, ‚/‘ ) );
$result = preg_grep( ‚/^‘ . $search . ‚$/i‘, array_keys( $array ) );
if ( $return == ‚key-value‘ )
return array_intersect_key( $array, array_flip( $result ) );
return $result;
}

function array_value_exists_wildcard ( $array, $search, $return = “ ) {
$search = str_replace( ‚\*‘, ‚.*?‘, preg_quote( $search, ‚/‘ ) );
$result = preg_grep( ‚/^‘ . $search . ‚$/i‘, array_values( $array ) );
if ( $return == ‚key-value‘ )
return array_intersect( $array, $result );
return $result;
}

$array = array(
‚test_123′ => ’sbr123‘,
‚Test_12345‘ => ‚bbb456‘,
‚test_222‘ => ‚bry789‘,
‚test_ewrwe‘ => ‚abc777‘,
‚t1est_eee‘ => ‚def950‘
);

$search = ‚test*‘;
print_r( array_key_exists_wildcard( $array, $search ) );
print_r( array_key_exists_wildcard( $array, $search, ‚key-value‘ ) );

$search = ‚b*‘;
print_r( array_value_exists_wildcard( $array, $search ) );
print_r( array_value_exists_wildcard( $array, $search, ‚key-value‘ ) );

/*
Outputs:
Array
(
[0] => test_123
[1] => Test_12345
[2] => test_222
[3] => test_ewrwe
)
Array
(
[test_123] => sbr123
[Test_12345] => bbb456
[test_222] => bry789
[test_ewrwe] => abc777
)
Array
(
[1] => bbb456
[2] => bry789
)
Array
(
[Test_12345] => bbb456
[test_222] => bry789
)
*/
[/source]

Kudo’s to logic_earth