how to pass echo value in function in hidden type input

Question

In file b.php there is an echo value,ie echo $abc; and i want to pass this echo value in function in hidden type input so that this echo value goes to another page by function parameter which is called in input type hidden. <input type="hidden" name="" value="<?php fun( echo $abc;)?>">

Answer 1

只需删除echo即可：

<input type="hidden" name="" value="<?php fun($abc) ?>">