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I am working on an application at work which is pretttty old and is using PHP with the Smarty templating engine. We basically have three registration options, but if they selection option 2, they also need to check a box to verify they have attended a workshop.

The validator line (validator form="personal_form" field="program_attended" rule="required" message="Please confirm that you have attended an InsideOut Coaching Workshop") works, but I can't seem to make it conditional on option2 being checked.

Any thoughts?

<h3>1. Program Selection</h3>

<div class="radio">
 <label style="color:#d3d3d3;/if">
<input type="radio" if $p.session.event.personal.program=='option1'checked="checked"/if name="program" id="program1" value="option1" checked="" disabled="disabled" style="color:#d3d3d3"/if>
Workshop + Certification (3 day): <strong>$$p.session.event.prices.product2.general.default</strong>
</label>
</div>

<div class="radio">
 <label>
<input id="option2_radio" type="radio" if $p.session.event.personal.program=='option2'checked="checked" /if name="program" id="program2" value="option2" isset_or($p.session.event.event.others.t3_standalone,0) == 1) && !isset($p.session.event.personal.program)checked="checked"/if>
Certification Only (2 day): <strong>$$p.session.event.prices.product3.general.default</strong>
</label>
 <div class="form-group">
 <div class="col-sm-12">
 <div class="checkbox">
 <label class="blue">
<input type="checkbox"
if $p.session.event.personal.program_attendedchecked="checked"/if name="program_attended"

value="1"/> Yes, I have attended a InsideOut Coaching Workshop
(required for certification)
</label> validator form="personal_form" field="program_attended" rule="required" message="Please confirm that you have attended an InsideOut Coaching Workshop"

 </div>
 </div>
 </div>