PHP array_search preg

Question

I want to search for '01.' that begins with the number of the array.

Expected output:

1 => string '01.02' (length=5)
2 => string '01.03' (length=5)
3 => string '01.04' (length=5)
32 => string '02.02' (length=5)
33 => string '02.03' (length=5)
34 => string '02.04' (length=5)
35 => string '02.05' (length=5)

My code:

$key = array_search('/^01./', $tomb_datum);
echo $key;
var_dump($key);

These preg match not work.

1) array_search doesn't take a regex as argument. 2) Do you want all elements starting with 01 or just the first one? — Rizier123
– Rizier123, Commented Mar 18, 2016 at 12:10

Lemon Kazi · Accepted Answer · 2019-12-04 06:53:35Z

5

There is a function dedicated for just this purpose, preg_grep. It will take a regular expression as first parameter, and an array as the second.

See the below example: FIDDLE

$haystack = array (
  '01.02',
  '01.03',
  '02.05',
  '02.07'
);

$matches  = preg_grep ('/^01/i', $haystack);

print_r ($matches);

edited Dec 4, 2019 at 6:53

answered Mar 18, 2016 at 12:16

Lemon Kazi

3,3192 gold badges41 silver badges72 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

zolyyy Over a year ago

There is another array, I want to be filtered based on the number next to the date

Anthony · Accepted Answer · 2016-03-18 12:19:50Z

0

If you're looking to filter the array, use array_filter:

$resultArray = array_filter($array, function($elm) {
  if (preg_match('/^01/', $elm)) {
    return true;
  } 
  return false;
});

Hope this helps.

answered Mar 18, 2016 at 12:19

Anthony

714 bronze badges

3 Comments

toster-cx Over a year ago

You could just return the preg_match directly w/o the ifs. Also, preg_grep is clearly better suited for this...

zolyyy Over a year ago

There is another array, I want to be filtered based on the number next to the date

Casimir et Hippolyte Over a year ago

Your approach can be interesting if you avoid the regex: function($elm) { return strpos($elm, '01') === 0; }

Danon · Accepted Answer · 2019-01-15 15:54:54Z

0

You could use T-Regx library which allows for all sorts of array filters:

pattern('^01.')->forArray($tomb_datum)->filter()

You can also use other methods like:

filter() - for regular (sequential) arrays
filterAssoc() - for associative arrays (filterAssoc() preserves keys)
filterByKeys() - to filter an array by keys, not values

PS: Notice that with T-Regx you don't need /.?/ delimiters!

answered Jan 15, 2019 at 15:54

Danon

3,00831 silver badges42 bronze badges

Collectives™ on Stack Overflow

PHP array_search preg

3 Answers 3

1 Comment

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related