Make new array from specifed string?

Question

I have this kind of simple array:

$puctures=array('1_noname.jpg','2_new.jpg','1_ok.jpg','3_lets.jpg','1_stack.jpg','1_predlog.jpg','3_loli.jpg');

I want to make new array that i will only have elements thats starts with 1_ Example

$new=array('1_noname.jpg','1_ok.jpg','1_stack.jpg','1_predlog.jpg');

Something like array_pop but how?

score 4 · Answer 1 · answered Oct 11 '13 at 08:48

4

See array_filter():

$new = array_filter(
    $puctures,
    function($a) {return substr($a, 0, 2) == '1_'; }
);

answered Oct 11 '13 at 08:48

Oswald

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I knew I should have used `array_filter`. I just could couldn't think of it when answering. – Ian Brindley Oct 11 '13 at 08:49
+1 Probably the most straight forward & simplest answer of the bunch =) – MackieeE Oct 11 '13 at 08:52

score 3 · Answer 2 · answered Oct 11 '13 at 08:46

3

Use array_filter() to get your array:

$new = array_filter($puctures, function($item)
{
   //here strpos() may be a better option:
   return preg_match('/^1_/', $item);
});

answered Oct 11 '13 at 08:46

Alma Do

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2

`preg_match` is better. The compiled regex is cached. `strpos` walks through the whole `$item` before determining that the found position is != 0. – Oswald Oct 11 '13 at 08:58

score 3 · Accepted Answer · answered Oct 11 '13 at 08:47

3

A simple loop will do.

foreach ($pictures as $picture) {
    if (substr($picture, 0, 2) == "1_") {
        $new[] = $picture;
    }
}

answered Oct 11 '13 at 08:47

Ian Brindley

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score 2 · Answer 4 · answered Oct 11 '13 at 08:46

2

This examples uses array_push() & strpos()

$FirstPictures = array();
foreach( $pictures as $pic => $value ) { 
   if ( strpos( $value, '1_' ) !== 0 ) {
      array_push( $FirstPictures, $pic );
   }
}

answered Oct 11 '13 at 08:46

MackieeE

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score 0 · Answer 5 · answered Oct 11 '13 at 08:54

0

$puctures=array('1_noname.jpg','2_new.jpg','1_ok.jpg','3_lets.jpg','1_stack.jpg','1_predlog.jpg','3_loli.jpg');
  $new=array();
  foreach($puctures as $value)
   {
   if(strchr($value,'1'))
   $new[]=$value;
   }
   echo "<pre>";  print_r($new);

answered Oct 11 '13 at 08:54

senthil

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Make new array from specifed string?

5 Answers5