Isset php

Php shorthand if isset

$var = $var ?? "default";

Source: stackoverflow.com

If exist php

if (isset($var)) {
  // Code here
}

Php see if undefined

if (isset($variable)) { /* do something */ };

Php isset post

if (!empty($_POST["mail"])) {
    echo "Yes, mail is set";    
} else {  
    echo "No, mail is not set";
}

Source: stackoverflow.com

Php isset

<?php

$var = '';

// This will evaluate to TRUE so the text will be printed.
if (isset($var)) {
    echo "This var is set so I will print.";
}

// In the next examples we'll use var_dump to output
// the return value of isset().

$a = "test";
$b = "anothertest";

var_dump(isset($a));      // TRUE
var_dump(isset($a, $b)); // TRUE

unset ($a);

var_dump(isset($a));     // FALSE
var_dump(isset($a, $b)); // FALSE

$foo = NULL;
var_dump(isset($foo));   // FALSE

?>

Source: php.net

Isset php

$variable=isset($otravariable);

Similar codes

4 votes288 views5 answers
Php strip tags
PHP
25 votes292 views6 answers
Header location php
PHP
0 vote307 views1 answer
Wordpress disable xmlrpc
PHP
16 votes287 views2 answers
Alerta con php
PHP
25 votes295 views2 answers
Php switch 2 variables
PHP
0 vote469 views1 answer
Laravel one session per user
PHP Laravel
1 vote279 views3 answers
Php check if some string contains from array
PHP
19 votes282 views5 answers
Using js variable in php
PHP
13 votes321 views6 answers
Prefix laravel route
PHP Laravel
22 votes302 views6 answers
Php get array key
PHP