isset v php
/**
* Returns a bool (true or false)
*/
isset($x);
/**
* Examples
*/
$x = 'myValue';
if(isset($x)){
echo 'x is set';
}
/**
* this will echo out 'x is set'
*/
$x = null;
if(isset($x)){
echo 'x is set';
}
/**
* This will NOT echo out 'x is set'
*/
if(isset($y)){
echo 'y is set';
}
/**
* This will NOT echo out 'y is set'
*/
pokud existuje php
if (isset($var)) {
// Code here
}
php zjistit, zda nedefinované
if (isset($variable)) { /* do something */ };
php zkontrolujte, zda parametr existuje
if(isset($_GET['id']))
{
$slide = $_GET['id'] // Getting parameter value inside PHP variable
}
isset odeslat v php
if(isset($_POST['submit']){
//Your Code Here
}