https://www.php.net › manual › fr › function.empty
PHP: empty - ManualIf you want to use empty() to evaluate an expression (not a variable), and you don't have PHP 5.5+, you can do it by wrapping the call to empty in a function, like so: <?php function is_empty ($var) {return empty($var);}?> Then you can do something like <?php if(is_empty (NULL)) {/* ... */}?>
https://stackoverflow.com › questions › 8777591
php - check if variable empty - Stack OverflowThe best and easiest way to check if a variable is empty in PHP is just to use the empty() function. if empty($variable) then ....
https://www.w3schools.com › php › func_var_empty.asp
PHP empty() Function - W3SchoolsThe empty() function checks whether a variable is empty or not. This function returns false if the variable exists and is not empty, otherwise it returns true. The following values evaluates to empty: 0; 0.0 "0" "" NULL; FALSE; array()
https://www.php.net › manual › fr › control-structures.if.php
PHP: if - ManualL'instruction if est une des plus importantes instructions de tous les langages, PHP inclus. Elle permet l'exécution conditionnelle d'une partie de code. Les fonctionnalités de l'instruction if sont les mêmes en PHP qu'en C : if (expression) commandes.
https://www.phptutorial.net › php-tutorial › php-empty
PHP empty - PHP TutorialLearn how to use the PHP empty() construct to test if a variable is not set or its value is false. See examples, syntax, and comparison with isset() and equality operator.
https://openclassrooms.com › forum › sujet › if-empty-et-if-isset-53487
[Résolu] if (empty) et if (isset) ? - Lequel des 2 est le mieux ...voici mon code qui vérifie avec !empty. <?php if(!empty($_POST['membre_question_secrete'])) { echo 'Vous avez omis de préciser votre question secrète. Merci de réessayer.'; } else { if(!empty($_POST['membre_reponse_secrete'])) { echo 'Vous avez omis de préciser la réponse à votre question secrète. Merci de réessayer ...
https://www.lephpfacile.com › manuel-php › function.empty.php
empty - Détermine si une variable est vide - Le PHP Facilebool empty ( mixed $var ) Détermine si une variable est considérée comme vide. Une variable est considérée comme vide si elle n'existe pas, ou si sa valeur équivaut à FALSE. La fonction empty () ne génère pas d'alerte si la variable n'existe pas.
https://www.w3docs.com › learn-php › empty.html
Empty() - W3docsLearn how to use the empty() function in PHP to determine if a variable is empty or not. See the syntax, example usage, and quiz to test your skills.
https://stackoverflow.com › questions › 4531288
PHP best way to check whether a string is empty or not// Determines if the supplied string is an empty string. // Empty is defined as null or containing only whitespace. // '0' is NOT an empty string! function isEmptyString($str) { return !(isset($str) && (strlen(trim($str)) > 0)); }
https://www.w3docs.com › learn-php › empty-in-php.html
Empty - W3docsThe "empty" keyword is a function in PHP that is used to determine whether a variable is empty. In this article, we will explore the syntax and usage of the "empty" keyword in depth, and provide plenty of examples to help you master this important PHP feature.
