How to customize data using WordPress hooks in WP? -

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i have wordpress plugin displays recipe food. want customize ingredients before displaying it. i'm using plugin hook this. have create separate plugin (functions.php) customize data before displaying. when run page ingredients array() in customize_recipe_field($arg) function , change ingredient using ingredient name:

$arg[$key]['ingredient'] = $data['ingredient']."-demo";` add "-demo"

after print $arg , changes done plugin function, when displays on web page no changes done. still shows old data.

here customize function:

function customize_recipe_field($arg) {     foreach ($arg $key=>$data){         $arg[$key]['ingredient'] = $data['ingredient']."-demo";     }     return $arg; } add_action('recipe_field_ingredients', 'customize_recipe_field');


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