php
Validate a number using filter_var() method in PHP
If you want to validate a number in PHP you can use the filter_var() method and pass value and FILTER_VALIDATE_INT as parameters.
<?php
$value = 500;
if (!filter_var($value, FILTER_VALIDATE_INT) === false) {
echo("Value is valid");
} else {
echo("Value is invalid");
}
// -> Value is valid
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