How to extract Numbers From a String in PHP ?

The purpose of this article is to extract numbers from a string using PHP.

Approach:

We can use the preg_replace() function for the extraction of numbers from the string.

• /[^0-9]/ pattern is used for finding number as integer in the string (Refer to Example 1)
• /[^0-9\.]/ pattern is used for finding number as double in the string (Refer to Example 2)

Example 1:

PHP

<?php
    $string = '$ 90,000,000.0098';
    echo preg_replace("/[^0-9]/", '', $string);
    echo "\n<br/>";

    $string2 = '$ 90,000,000.0098';
    echo preg_replace("/[^0-9\.]/", '', $string2);
?>

Output

900000000098
90000000.0098

Example 2: The complete code for extracting number from the string is as follows

PHP

<?php
    $string = '$ 90,000,000.0098';
    echo preg_replace("/[^0-9]/", '', $string);
    echo "\n<br/>";

    $string2 = '$ 90,000,000.0098';
    echo preg_replace("/[^0-9\.]/", '', $string2);
    echo "\n<br/>";

    $string3 = 'Jack has 10 red and 14 blue balls';
    echo preg_replace("/[^0-9]/", '', $string3);
    echo "\n";
?>

Output

900000000098
90000000.0098
1014