Created
November 3, 2025 13:46
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| <?php | |
| /** | |
| * Update the three IDs below with your own field IDs | |
| */ | |
| function demo_get_start_date_field_id() { | |
| return 1245; // The ID of the date field for the start date | |
| } | |
| function demo_get_end_date_field_id() { | |
| return 1246; // The ID of the date field for the end date | |
| } | |
| function demo_get_result_field_id() { | |
| return 1247; // The ID of the number field for the difference | |
| } | |
| function demo_date_difference() { | |
| ?> | |
| <script> | |
| ( function( $ ) { | |
| var date_difference = { | |
| init: function() { | |
| var result_field_id = <?php echo demo_get_result_field_id(); ?>; | |
| $( '.pewc-number-field-' + result_field_id ).attr( 'readonly', true ); | |
| $( 'body' ).on( 'change update','.pewc-date-field', this.check_difference ); | |
| }, | |
| check_difference: function() { | |
| // pewc-date-field-1246 | |
| var start_field_id = <?php echo demo_get_start_date_field_id(); ?>; | |
| var end_field_id = <?php echo demo_get_end_date_field_id(); ?>; | |
| var start_date = $( '.pewc-date-field-' + start_field_id ).val(); | |
| var end_date = $( '.pewc-date-field-' + end_field_id ).val(); | |
| if( start_date && end_date ) { | |
| start_date = new Date( start_date ); | |
| end_date = new Date( end_date ); | |
| diff_time = Math.abs( end_date - start_date ); | |
| diff_days = Math.floor( diff_time / ( 1000 * 60 * 60 * 24 ) ); | |
| $( '.pewc-number-field-' + <?php echo demo_get_result_field_id(); ?> ).val( diff_days ); | |
| } | |
| } | |
| } | |
| date_difference.init(); | |
| })( jQuery ); | |
| </script> | |
| <?php | |
| } | |
| add_action( 'wp_footer', 'demo_date_difference' ); |
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