Split string into 2 pieces by length using PHP

Question

I have a very long string that I want to split into 2 pieces.

I ws hoping somebody could help me split the string into 2 separate strings.

I need the first string to be 400 characters long and then the rest in the second string.

There still is a section in the PHP Manual called **[String Functions](http://www.php.net/manual/en/ref.strings.php)**. ***And:*** Going through your previous questions I cannot but notice that there is lots of questions that are easily answered by searching the PHP Manual or Google or Stack Overflow. You are encouraged to do some research before asking new questions here. See http://stackoverflow.com/questions/ask-advice — hakre, Jul 25 '11 at 21:52
possible duplicate of [Split string into equal parts using PHP](http://stackoverflow.com/questions/1794006/split-string-into-equal-parts-using-php) — hakre, Jul 25 '11 at 22:06
It's not actually a duplicate of that, I don't think. This is looking to pull out a "teaser" of N characters to one string, then the rest of the original to a second string - only 2 total. The linked question is asking to split the string into as many parts as needed. — squarecandy, Dec 18 '13 at 20:24

score 70 · Accepted Answer · answered Jul 25 '11 at 21:40

70

$first400 = substr($str, 0, 400);
$theRest = substr($str, 400);

You can rename your variables to whatever suits you. Those names are just for explanation. Also if you try this on a string less than 400 characters $theRest will be FALSE

answered Jul 25 '11 at 21:40

Paul

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Hmm, I can imagine a for loop as well that "just works." But why don't I suggest that? – hakre Jul 25 '11 at 22:03

score 23 · Answer 2 · answered Jul 25 '11 at 22:01

23

There is a function called str_split^{PHP Manual} which might, well, just split strings:

$parts = str_split($string, $split_length = 400);

$parts is an array with each part of it being 400 (single-byte) characters at max. As per this question, you can as well assign the first and second part to individual variables (expecting the string being longer than 400 chars):

list($str_1, $str_2) = str_split(...);

answered Jul 25 '11 at 22:01

hakre

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1

If the string is less than 800 characters too. – Paul Aug 08 '11 at 22:32
2

How do you know it's not an issue? They could have a string that is 1000 characters and want to split it into 400 and 600 – Paul Aug 08 '11 at 22:53
Was *just* seeing that one :) – hakre Aug 08 '11 at 22:54

score 0 · Answer 3 · answered Aug 19 '20 at 20:18

This is another approach if you want to break a string into n number of equal parts

<?php

$string = "This-is-a-long-string-that-has-some-random-text-with-hyphens!";
$string_length = strlen($string);

switch ($string_length) {

  case ($string_length > 0 && $string_length < 21):
    $parts = ceil($string_length / 2); // Break string into 2 parts
    $str_chunks = chunk_split($string, $parts);
    break;

  default:
    $parts = ceil($string_length / 3); // Break string into 3 parts
    $str_chunks = chunk_split($string, $parts);
    break;

}

$string_array = array_filter(explode(PHP_EOL, $str_chunks));

?>

Split string into 2 pieces by length using PHP

3 Answers3

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