Revisions to PHP: checking for $_GET variables with if statements

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edited May 23, 2017 at 12:40

1

Array Merge

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method, a getOrDefault() function, or some enigmatic logic operator enigmatic logic operator code is better suited when setting defaults not already in an array.

Logic Operators

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

Array Merge

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method, a getOrDefault() function, or some enigmatic logic operator code is better suited when setting defaults not already in an array.

Logic Operators

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

Array Merge

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method, a getOrDefault() function, or some enigmatic logic operator code is better suited when setting defaults not already in an array.

Logic Operators

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

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edited Apr 13, 2017 at 12:40

Community Bot

1

Array Merge

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method method, a getOrDefault()getOrDefault() function, or some enigmatic logic operator code is better suited when setting defaults not already in an array.

Logic Operators

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

Array Merge

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method, a getOrDefault() function, or some enigmatic logic operator code is better suited when setting defaults not already in an array.

Logic Operators

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

Array Merge

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method, a getOrDefault() function, or some enigmatic logic operator code is better suited when setting defaults not already in an array.

Logic Operators

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

formatting

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edited Aug 5, 2011 at 18:25

Tim Lytle

251
1
4

Array Merge

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method, a getOrDefault() function, or some enigmatic logic operator code is better suited when setting defaults not already in an array.

Logic Operators

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method, a getOrDefault() function, or some enigmatic logic operator code is better suited when setting defaults not already in an array.

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

Array Merge

If you're just setting defaults, you could use array_merge():

$defaults = array(
    'getvar1' => 'default setting', //a default value
    'getvar2' => false //now you can just test
);

$params = array_merge($defaults, $_GET); //any missing elements get the default value

echo $params['getvar1']; //will output 'default setting' if $_GET['getvar1'] was not set

if($params['getvar2']){
     //do something if $_GET['getvar2'] was set to a non-false value
}

It should be noted that this only works with things like $_GET - that are already arrays. The ternary method, a getOrDefault() function, or some enigmatic logic operator code is better suited when setting defaults not already in an array.

Logic Operators

Here's an example of using logic operators (similar to using ternary operator) from the default Zend MVC index.php:

defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));

Using the question's example, it would look something like this:

isset($_GET['getvar1']) || $_GET['getvar1'] = 'default value';

added logic operator example

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edited Aug 5, 2011 at 15:02

Tim Lytle

251
1
4

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answered Aug 4, 2011 at 19:33

Tim Lytle

251
1
4

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