How to use strpos() and substr() functions In PHP

Using Regular Expressions

In this approach we are using strpos to find the position of the opening bracket “[“ and strpos again to find the position of the closing bracket “]”. Then we use substr to extract the substring between the two positions.

Syntax:

strpos(string, bracket);
substr(string, start, end);

Example: This example uses strpos and substr functions Extract substrings between brackets in PHP.

PHP

<?php
$string = "This is [sample] text [with] brackets";
$start = 0;

while (($start = strpos($string, '[', $start)) !== false) {
    $end = strpos($string, ']', $start);
    if ($end === false) {
        break;
    }

    $extracted = substr($string, $start + 1
                        , $end - $start - 1);
    echo $extracted . PHP_EOL;

    $start = $end + 1;
}

?>

Output

sample
with

Extract Substrings Between Brackets in PHP

In PHP, extracting substrings between brackets can be done using various approaches. We have to print the word that is present in between the brackets.

These are the following approaches:

Table of Content