How to Split String in PHP: Syntax and Examples

In PHP, you can split a string into parts using the explode() function, which breaks the string by a specified delimiter and returns an array of substrings. The syntax is explode(delimiter, string), where delimiter is the character or string to split by.

Syntax

The explode() function splits a string into an array using a delimiter.

• delimiter: The character(s) where the string will be split.
• string: The original string to split.
• limit (optional): Maximum number of elements in the returned array.

php

array explode(string $delimiter, string $string, int $limit = PHP_INT_MAX);

Example

This example splits a sentence into words using space as the delimiter and prints each word.

php

<?php
$text = "Hello world from PHP";
$words = explode(" ", $text);
foreach ($words as $word) {
    echo $word . "\n";
}
?>

Output

Hello
world
from
PHP

Common Pitfalls

Common mistakes include:

• Using the wrong delimiter that does not exist in the string, resulting in the whole string returned as one element.
• Forgetting that explode() returns an array, so you must handle it accordingly.
• Not using the optional limit parameter when you want to control the number of splits.

php

<?php
// Wrong delimiter example
$text = "apple,banana,orange";
$fruits = explode(";", $text); // Wrong delimiter
var_dump($fruits); // Outputs whole string as one element

// Correct delimiter
$fruits = explode(",", $text);
var_dump($fruits);
?>

Output

array(1) {
  [0]=>
  string(19) "apple,banana,orange"
}
array(3) {
  [0]=>
  string(5) "apple"
  [1]=>
  string(6) "banana"
  [2]=>
  string(6) "orange"
}

Quick Reference

Remember these tips when splitting strings in PHP:

• Use explode() to split by a delimiter.
• The delimiter can be any string, like space, comma, or dash.
• The result is always an array.
• Use the optional limit to control how many pieces you get.

Key Takeaways

Use explode() to split strings by a delimiter in PHP.

The function returns an array of substrings split at each delimiter.

Choose the correct delimiter to get expected results.

Remember to handle the returned array properly.

Use the optional limit parameter to control the number of splits.