Why is wp_dropdown_categories adding two select dropdowns?

  • Unit9

    (@unit9)


    10 years, 1 month ago

    Hi guys, 🙂

    I’ve been using this code in the “Dropdown without a Submit Button using JavaScript (2)” section of that page:

    <?php
$select = wp_dropdown_categories('show_option_none=Select category&show_count=1&orderby=name&echo=0');
$select = preg_replace("#<select([^>]*)>#", "<select$1 onchange='return this.form.submit()'>", $select);
echo $select;
?>

    I’ve used it in a few of my wordpress installations and every time it outputs two select fields with the categories inside. But only the second one has the required form onsubmit code: onchange=’return this.form.submit()’

    Does anyone know why it’s adding two category drop downs for me and is there any way I can stop it other than using some hacky CSS first-child display none? 😀

    Thanks!

Viewing 2 replies - 1 through 2 (of 2 total)
  • Thread Starter Unit9

    (@unit9)

    10 years, 1 month ago

    Hi guys,

    I’ve come to the conclusion that

    wp_dropdown_categories()

    Is echoing to the front end of the site without me telling it to. And then echoing out again with the preg_replace onchange=’return this.form.submit()’ code included.

    Is there any way I can prevent wp_dropdown_categories() from echoing to the front-end in the first instance?

    Thanks! 🙂

    hussong

    (@hussong)

    10 years ago

    You can set up an array of arguments

    $args = array(
	'show_option_all'    => false,
	'show_option_none'   => ' ',
	'orderby'            => $orderby,
	'order'              => $ascdsc,
	'show_count'         => $showcount,
	'hide_empty'         => 1,
	'child_of'           => $childof,
	'exclude'            => $exclude,
	'echo'               => 0,
)

    and pass that to wp_dropdown_categories

    $select = wp_dropdown_categories($args);
$select = preg_replace("#<select([^>]*)>#", "<select$1 onchange='return this.form.submit()'>", $select);
echo $select;
Viewing 2 replies - 1 through 2 (of 2 total)
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