java - How to add onchange function inside php form input -


this php form input

 <?php echo form_input(array('name' => $items['rowid']."_qty",'id' => $items['rowid']."_qty", 'value' => $items['qty'], 'maxlength' => '3', 'size' => '5'));  ?>                     <button class="btn btn-success " onclick="update_cart('<?=$items['rowid'];?>')" >update</button>

help me add onchange function inside this

please define onchange key in setter , send in function name define function in javascript.

<?php echo form_input(array('name' => $items['rowid']."_qty",'id' => $items['rowid']."_qty",'onchange'=> $items['onchange'], 'value' => $items['qty'], 'maxlength' => '3', 'size' => '5'));  ?>

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