How to Check if String contains only Numeric Digits in PHP - Step by Step Examples

How to Check if String contains only Numeric Digits in PHP ?

Answer

To check if a string contains only numeric digits in PHP, you can use functions like ctype_digit or preg_match with regular expressions.

✐ Examples

1 Check if String contains only Numeric Digits using ctype_digit function

In this example,

We use the ctype_digit function with the string to check if it contains only digits.
If the string contains only numeric digits, containsDigits will be true, otherwise false.
Finally, we echo the result.

PHP Program

<?php 
$str1 = "12345";
$containsDigits = ctype_digit($str1);
echo "String contains only numeric digits: " . ($containsDigits ? 'true' : 'false');
?>

Output

String contains only numeric digits: true

2 Check if String contains only Numeric Digits using preg_match function

In this example,

We use the preg_match function with a regular expression pattern to check if the string contains only numeric digits.
If the string matches the pattern, matchDigits will be true, otherwise false.
Finally, we echo the result.

PHP Program

<?php 
$str2 = "12345";
$matchDigits = preg_match('/^[0-9]+$/', $str2);
echo "String contains only numeric digits: " . ($matchDigits ? 'true' : 'false');
?>

Output

String contains only numeric digits: true

Summary

In this tutorial, we learned How to Check if String contains only Numeric Digits in PHP language with well detailed examples.

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How to Check if String contains only Numeric Digits in PHP - Step by Step Examples

How to Check if String contains only Numeric Digits in PHP ?

Answer

✐ Examples

1 Check if String contains only Numeric Digits using ctype_digit function

PHP Program

Output

2 Check if String contains only Numeric Digits using preg_match function

PHP Program

Output

Summary

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