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Populate Taxonomy ID dynamically

  • Hi

    I am using a frontend form to submit custom post type entries. Everything works fine except I am not able to populate dynamically the category from the select.

    <select id="acf-field_5a903d3132d04" name="acf[field_5a903d3132d04]">
        <option value="1">Foo</option>
        <option value="2">Bar</option>
    "new_post" => array(
        'post_type' => 'my_post',
        'post_status' => 'publish',
        'tax_input'     => array(
            'custom_tax_category' => array( 'annuaire_category' ),
            'custom_tax_tag' => array( $_POST['acf[field_5a903d3132d04]'] )

    Any help would be appreciated

  • G’day Mate,

    the form name, name="acf[field_5a903d3132d04]" is representation of acf array with key ‘field_5a903d3132d04’.

    So your value should be:
    $_POST['acf']['field_5a903d3132d04'] 😉


  • Thanks but unfortunately it does not work

    'new_post' => array(
        'post_type' => 'annuaire',
        'post_status' => 'publish',
        'tax_input'     => array(
            'custom_tax_category' => array( 'annuaire_category' ),
            'custom_tax_tag'      => array( $_POST['acf']['field_5a903d3132d04'] )

    Following code is well returning the select value when form is submited but it seems that data is not send with form.

    $test = $_POST['acf']['field_5a903d3132d04'];
    echo 'value ' . $test;
  • If the data isn’t sent from the form, you can dump out the post value before your code and see what’s the actual key is. (maybe there’s a typo in your field key)

    echo '<pre>';
    echo '</pre>';

    Another reason might be, the form is sending the value as a string, but the wp functions requires a pure integer. See last example in the doc,

    So, your code might even need to cast the value with intval first.

    'custom_tax_tag => array( intval($_POST['acf']['field_5a903d3132d04']) )


  • I have open a new thread because your code was good and helpful to get the taxonomy by key_field but I have another issue to make it set the category on my cpt.

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