This tutorial will discuss how to check if string contains only numbers in PHP.
To check if a string contains only numbers in PHP, we can use the ctype_digit() function.
The ctype_digit() function accepts a string as an argument and returns true if all the characters in the string are numerical. If there is at least one non-numeric character, it will return false.
In the below example, we will use this ctype_digit() to check if string “97856” contains a numeric value or not.
Let’s see the complete example,
<?php
$strValue = '97856';
// Check if string contains only digits
if (ctype_digit($strValue)) {
echo "The string contains only numbers.";
} else {
echo "The string contains non-numeric characters.";
}
?>
Output
The string contains only numbers.
Summary
Frequently Asked:
- Check if String is an Email Address in PHP
- Check if String is a Number in PHP
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Today, we learned how to check if string contains only numbers in PHP.