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Finds whether the type of the given variable is integer. Note: To test if a variable is a number or a numeric string (such as form input, which is always a string), you must use is_numeric ().
The is_int () function checks whether a variable is of type integer or not. This function returns true (1) if the variable is of type integer, otherwise it returns false.
Using is_numeric() for checking if a variable is an integer is a bad idea. This function will return TRUE for 3.14 for example. It's not the expected behavior. To do this correctly, you can use one of these options: Considering this variables array :
- Using is_numeric() for checking if a variable is an integer is a bad idea. This function will return TRUE for 3.14 for example. It's not the expect...
- All $_GET parameters have a string datatype, therefore, is_int will always return false. You can see this by calling var_dump : var_dump($_GET['p']...
- When the browser sends p in the querystring, it is received as a string, not an int. is_int() will therefore always return false. Instead try is_n...
- Just for kicks, I tested out a few of the mentioned methods, plus one I've used as my go to solution for years when I know my input is a positive n...
- /!\ Best anwser is not correct, is_numeric() returns true for integer AND all numeric forms like "9.1" For integer only you can use the unfriendly...
- doctormad's solution is not correct. try this: $var = '1a'; if ((int) $var == $var) {var_dump("$var is an integer, really?"); }this prints 1a...
- I had a similar problem just now! You can use the filter_input() function with FILTER_VALIDATE_INT and FILTER_NULL_ON_FAILURE to filter only intege...
- Values $_GET are always strings – that's what GET paramters come as. Therefore, is_int($_GET[...]) is always false. You can test if a string consis...
- You could try using a casting operator to convert it to an integer: $page = (int) $_GET['p'];if($page == "") {$page = 1; } if(empty($page) ||...
Mar 30, 2026 · Guide complet de la fonction is_int() en PHP pour tester si une variable est de type entier. Exemples pratiques, différences avec is_numeric() et cas d'usage courants.
The PHP Variable Handling is_int() function is used to check if a variable is an integer. It supports PHP 4, PHP 5, PHP 7, and PHP 8. An integer is a whole number, like 10, -5 or 1000.
Aug 19, 2022 · The is_int () function is used to test whether the type of the specified variable is an integer or not.
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What is is_int() function?
Aug 9, 2024 · In PHP, determining the type of a variable is crucial for ensuring that your code behaves as expected. One of the most commonly used functions for this purpose is is_int (). This function checks if a given variable is of the integer type. In this guide, we’ll explore how to use is_int (), its use cases, and some practical examples to help you understand its functionality better. What is the ...
