array_merge
Use array_merge when you want to merge indexed arrays without keys:Output:
Array Union Operator (+)
Use the union operator when you want to extend an array or override certain key values. A good use case for this is overriding/extending a default settings array with a user defined array (similar to how you would use $.extend while writing a jQuery plugin):
Output:
1 comment:
I find this confusing:
$default_settings = array('page'=>3, 'per_page'=>100);
$user_override = array('per_page'=>50, 'format'=>'json');
$overriden_setting = $user_override + $default_settings;
I would rather write either:
$default_settings = array('page'=>3, 'per_page'=>100);
$user_override = array('per_page'=>50, 'format'=>'json');
$overridden_settings = array_merge($default_settings, $user_override);
or:
$minimal_settings = array('page'=>3, 'per_page'=>100);
$user_provided = array('per_page'=>50, 'format'=>'json');
$completed_settings = $user_provided + $minimal_settings;
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