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i have used variable_set to save one value.How can i save multiple values through array using variable_set. Please provide the solution

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2 Answers 2

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I think best way to save array value in varible_set(); is json. drupal_json_encode() and drupal_json_decode() function in drupal 7.

You can do something like this:-

$var_input = array(
 'key1' => 'value1',
 'key2' => 'value2'
);
$var_input = json_encode($var_input);  // convert to json

variable_set('var1', $var_input); // set in variable

$var_output = variable_get('var1'); // get from variable

$var_output = drupal_json_decode($var_output); // decode json

print_r($var_output);

Hope this help!

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1  
No need to save as JSON, especially when variable_get is called and used in PHP just set the variable with variable_set and pass an array. That way, an array will be returned with variable_get automatically ready for PHP. –  David Thomas Oct 10 '14 at 8:38
up vote 2 down vote

It's the same way:

The variable_set function saves the variable to database serializing it. Variable_get takes the variable from $conf where the variable is already unserialized.

Example:

$var1 = array(
 'key1' => 'value1',
 'key2' => 'value2'
);
variable_set('var1', $var1);
print_r variable_get('var1');

Output

Array
(
    [key1] => value1
    [key2] => value2
)
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Yes, this is the way to do it, just pass an array to variable_set. Although perhaps a consequence of brevity and example, do remember to pass a default value of the expected data type to variable_get as the second parameter, e.g $var1 = variable_get('var1', array()); –  David Thomas Oct 10 '14 at 8:39
    
the second parameter in variable_get is optional on D7. –  jorgetutor Oct 10 '14 at 9:04
1  
Optional, but recommended. For example, imagine you're going to foreach over that variable and it's empty for some reason, you would then foreach over NULL and trigger a PHP notice error whereas passing array() as the expected default value data type will avoid such an error. –  David Thomas Oct 10 '14 at 9:09

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