Description
Need to dynamically populate a field’s choices? This tutorial will cover how to take a value saved to the options page and use it to override the choices for a select field. As the ‘choices’ array attribute is used for the radio, checkbox and select fields, this tutorial can be transposed onto any of these fields.
Requirements
- Understanding of the filter: acf/load_field
Example 1
In this example, we will load a textarea field from the options page (textarea field is called my_select_values) and use the text on each line as a option for the select field’s choices. The select field in this example has a name of “color”.
functions.php
function acf_load_color_field_choices( $field ) {
// reset choices
$field['choices'] = array();
// get the textarea value from options page without any formatting
$choices = get_field('my_select_values', 'option', false);
// explode the value so that each line is a new array piece
$choices = explode("\n", $choices);
// remove any unwanted white space
$choices = array_map('trim', $choices);
// loop through array and add to field 'choices'
if( is_array($choices) ) {
foreach( $choices as $choice ) {
$field['choices'][ $choice ] = $choice;
}
}
// return the field
return $field;
}
add_filter('acf/load_field/name=color', 'acf_load_color_field_choices');
Example 2
In this example, we will load a repeater field from the options page (repeater field is called my_select_values) and use the sub fields value and label as the options for the select field’s choices. The select field in this example has a name of “color”.
functions.php
function acf_load_color_field_choices( $field ) {
// reset choices
$field['choices'] = array();
// if has rows
if( have_rows('my_select_values', 'option') ) {
// while has rows
while( have_rows('my_select_values', 'option') ) {
// instantiate row
the_row();
// vars
$value = get_sub_field('value');
$label = get_sub_field('label');
// append to choices
$field['choices'][ $value ] = $label;
}
}
// return the field
return $field;
}
add_filter('acf/load_field/name=color', 'acf_load_color_field_choices');