'cascading' explode string in php

Question

How to explode this string :

00004.00001.00003.00001.00003

in an array like this :

array (size=3)
  0 => string '00004' (length=5)
  1 => string '00004.00001' (length=10)
  2 => string '00004.00001.00003' (length=15)
  3 => string '00004.00001.00003.00001.00003' (length=20)

Thx

Do you mean to have 5 elements in the resulting array? It looks like the last element in your array breaks with the pattern you're after. — hall.stephenk
– hall.stephenk, Commented Nov 28, 2012 at 17:06
array (size=3)? Make sure your explanation is right please/ — Prisoner
– Prisoner, Commented Nov 28, 2012 at 17:07
It's probably some variable dump output, but not that of the commonly used print_r or var_dump. On topic: This is not so hard to do, what have you tried? — Halcyon
– Halcyon, Commented Nov 28, 2012 at 17:08
Explode, then a set of nested for loops to concatenate. Good luck with your homework. — Sammitch
– Sammitch, Commented Nov 28, 2012 at 17:09
Ho what a beautiful surprise at the wake up :) ok I answer even if I see the solution below : array (size=3) it's only a mistake a made when I wrote the question. Thx all — MrSo
– MrSo, Commented Nov 29, 2012 at 8:05

ceejayoz · Accepted Answer · 2012-11-28 17:09:22Z

3

$array = explode('.', '00004.00001.00003.00001.00003');

foreach($array as $key => $value) {
  if($array[$key - 1]) {
    $array[$key] = $array[$key - 1] . '.' . $value;
  }
}

answered Nov 28, 2012 at 17:09

ceejayoz

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2 Comments

MrSo Over a year ago

Thank you Ceejayoz. This is the solution for my purpose. if(!empty($array[$key - 1])) remove error notice.

ceejayoz Over a year ago

Yeah, some PHP error reporting settings will complain there. You can also do if(isset($array[$key - 1])).

Lukasz Kujawa · Accepted Answer · 2012-11-28 17:09:12Z

0

Explode it first as you would normally do $arr = explode('.', $str); and then build desired array with two loops.

answered Nov 28, 2012 at 17:09

Lukasz Kujawa

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Comments

Nelson Benítez León · Accepted Answer · 2012-11-28 17:20:24Z

0

Another version using array_map() :

$arr = explode('.', '00004.00001.00003.00001.00003');
$arr[] = 'blank';
$array = array_map(function(){
     global $arr;
     array_pop($arr);
     return implode($arr);
}, $arr);

answered Nov 28, 2012 at 17:20

Nelson Benítez León

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1 Comment

MrSo Over a year ago

Thx for your answer. But this don't work. Here is the result I get : ` array (size=6) 0 => string '0000400001000030000100003' (length=25) 1 => string '00004000010000300001' (length=20) 2 => string '000040000100003' (length=15) 3 => string '0000400001' (length=10) 4 => string '00004' (length=5) 5 => string '' (length=0) `

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