sorting array with uasort comparing to a string with regex

Question

I am trying to sort an array "$refs" by comparing it to a string "$term" using uasort and regex :

this is my array :

Array
(
    [0] => Array
        (
            [id] => 71063
            [uniqid] => A12171063
            [label] => Pratique...
        )

    [1] => Array
        (
            [id] => 71067
            [uniqid] => A12171067
            [label] => Etre....
        )
...

and my code :

uasort($refs, function ($a, $b) use ($term) {
            $patern='/^' . $term . '/';  

            if ((preg_match($patern, $a['label']) - preg_match($patern, $b['label']) )== 0) {
                return 0;
            }

            if ((preg_match($patern, $a['label']) - preg_match($patern, $b['label'])) == 1) {
                return -1;
            }
            if ((preg_match($patern, $a['label']) - preg_match($patern, $b['label'])) == -1) {
                return 1;
            }
        });

I have only 0 like returns, where is my mistake !:/ Thanks

This is like a 1-liner in perl.. I can write something in Perl if that'd help — Zach Leighton
– Zach Leighton, Commented Jun 10, 2013 at 17:12
Works fine here. What's in the $term, I wonder? If it contains regex metacharacters, you probably need to preg_quote it. — raina77ow
– raina77ow, Commented Jun 10, 2013 at 17:17

Orangepill · Accepted Answer · 2013-06-10 17:59:16Z

3

Won't answer the question as stated but you could use this. It will effectively rank the results based on how close the term is to the beginning of the string.

function ($a, $b) use ($term) {
  return stripos($a, $term) - stripos($b, $term);
}

This will only work if all of the values have the term somewhere in them (like the results of a like query).

Test script:

$arr = array("aaTest", "aTest", "AAATest", "Test");
$term = "Test";
uasort($arr, function ($a, $b) use ($term) {
  return stripos($a, $term) - stripos($b, $term);
});

print_r($arr);

Test Output:

Array
(
    [3] => Test
    [1] => aTest
    [0] => aaTest
    [2] => AAATest
)

UPDATE

Changed code to use stripos instead of strpos for case insensitive sorting

edited Jun 10, 2013 at 17:59

answered Jun 10, 2013 at 17:15

Orangepill

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1 Comment

t.c Over a year ago

but i need theme to be at the begining !

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