How to extract Numbers From a String in PHP ? Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report Extracting numbers from a string involves identifying and isolating numerical values embedded within a text. This process can be done using programming techniques, such as regular expressions, to filter out and retrieve only the digits from the string, ignoring all other characters.Here we have some common approaches:Table of ContentUsing preg_replace() functionUsing str_split() and ctype_digit()Using filter_var() and Regular ExpressionsUsing preg_match_all()Using preg_replace() functionWe 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); ?> Output900000000098 90000000.0098Example 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"; ?> Output900000000098 90000000.0098 1014Using str_split() and ctype_digit()Using str_split() and ctype_digit() in PHP, you can extract numbers from a string by splitting it into characters, filtering out the digits, and then joining them back together.Example: PHP <?php $string = "The price is 100 dollars and 50 cents."; $characters = str_split($string); $numbers = array_filter($characters, 'ctype_digit'); echo implode('', $numbers) . PHP_EOL; // Output: 10050 ?> Output10050 Using filter_var() and Regular ExpressionsThe filter_var() function with the FILTER_SANITIZE_NUMBER_INT or FILTER_SANITIZE_NUMBER_FLOAT filters can be used to extract numbers from a string. This approach is useful when you need to sanitize a string and extract an integer or float.Example : Extracting Integer and Float Numbers Using filter_var()Here is the complete code for extracting an integer and a float number from a string using filter_var(): PHP <?php $string = '$ 90,000,000.0098'; $int_number = filter_var($string, FILTER_SANITIZE_NUMBER_INT); echo $int_number; echo "\n<br/>"; $float_number = filter_var( $string, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION ); echo $float_number; echo "\n<br/>"; $string2 = "Jack has 10 red and 14 blue balls"; $int_number2 = filter_var($string2, FILTER_SANITIZE_NUMBER_INT); echo $int_number2; echo "\n<br/>"; ?> Output900000000098 <br/>90000000.0098 <br/>1014 <br/>Using preg_match_all()The preg_match_all() function is used to perform a global regular expression match, which allows us to find all instances of numbers within a string. This method is flexible and can be tailored to extract integers, floats, or any other specific numerical patterns.Example PHP <?php // Function to extract all numbers (both integers and floats) from a string function extractNumbers($string) { // Define the regular expression pattern for numbers (both integers and floats) $pattern = '/\d+(\.\d+)?/'; // Use preg_match_all to find all matches preg_match_all($pattern, $string, $matches); // Return the array of matched numbers return $matches[0]; } // Test string containing numbers $string = "The prices are 123, 45.67 and 890.01 dollars."; // Extract numbers from the string $numbers = extractNumbers($string); // Print the extracted numbers print_r($numbers); ?> OutputArray ( [0] => 123 [1] => 45.67 [2] => 890.01 ) Comment More infoAdvertise with us Next Article PHP Syntax F farmaniasuravi Follow Improve Article Tags : Web Technologies PHP PHP-string PHP-function PHP-Questions +1 More Similar Reads PHP Tutorial PHP is a popular, open-source scripting language mainly used in web development. 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