Allow comparison of multiple values for checked(), selected(), and disabled()

[kingkool68]

The aim of this ticket is to make these convenience functions a little more convenient by allowing the comparison of multiple values for checked(), selected(), disabled(). Take the following use case of a form asking you to select days of the week:

Testing the value with if():

<?php
$days = array( 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday', );
$selected_days = array( 'Monday', 'Wednesday', 'Friday', );
foreach ( $days as $day ) { ?>
    <label><input type="checkbox" name="days[]" value="<?php echo esc_attr( $day ); ?>" <?php if ( in_array( $day, $selected_days ) ) echo 'checked="checked"'; ?>><?php echo $day; ?></label>
<?php } ?>

Using checked() instead:

<?php
$days = array( 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday', );
$selected_days = array( 'Monday', 'Wednesday', 'Friday', );
foreach ( $days as $day ) { ?>
    <label><input type="checkbox" name="days[]" value="<?php echo esc_attr( $day ); ?>" <?php checked( $selected_days, $day ); ?>><?php echo $day; ?></label>
<?php } ?>

[kingkool68]

Related: #22409, #10556

[johnbillion]

Thanks for the patch @kingkool68, but I don't believe we need any changes here. You can do this currently by passing in_array() to checked():

<input type="checkbox" <?php checked( in_array( $day, $selected_days ) ); ?>>

[kingkool68]

Replying to johnbillion:

Thanks for the patch @kingkool68, but I don't believe we need any changes here. You can do this currently by passing in_array() to checked():

<input type="checkbox" <?php checked( in_array( $day, $selected_days ) ); ?>>

Ah that is pretty clever. I didn't think to do it that way. Thanks!