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POSymfony, dynamic form modification won't use Anonymous functions
 

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    <p>Ok, here's the problem, I am using Symfony 2.3.5 on a unix shared hosting account running php v5.3.27. In my Symfony project I am attempting to use an EventListener to dynamically modify a form because I have some options that can't be determined until after the client is chosen. I have been following the example in the Symfony cookbook at <a href="http://symfony.com/doc/current/cookbook/form/dynamic_form_modification.html" rel="nofollow">http://symfony.com/doc/current/cookbook/form/dynamic_form_modification.html</a> to build the form. I have the following code in my form class:</p> <pre><code>&lt;?php // src/Save/ReportBundle/Form/Type/ReportSettingsType.php namespace Save\ReportBundle\Form\Type; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolverInterface; use Symfony\Component\Form\FormEvent; use Symfony\Component\Form\FormEvents; class ReportSettingsType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder-&gt;add('client', 'entity', array( 'class'=&gt;'Save\ClientBundle\Entity\Client', 'property'=&gt;'name', 'label'=&gt;'Client: ', 'empty_value' =&gt; '-- Select Client --' )) -&gt;add('newReport', 'choice', array( 'choices' =&gt; array( 1 =&gt; 'Yes', 0 =&gt; 'No' ), 'label' =&gt; 'Run New Report: ', 'mapped' =&gt; false, 'expanded' =&gt; true, 'multiple' =&gt; false )) -&gt;add('reportType', 'choice', array( 'choices' =&gt; array( 'aggregate' =&gt; 'Aggregate', 'filtered' =&gt; 'Filtered' ), 'label' =&gt; 'Report Type: ', 'expanded' =&gt; true, 'multiple' =&gt; false )) -&gt;add('reportSections', 'choice', array( 'choices' =&gt; array( 'welcomeLetter' =&gt; 'Welcome Letter Page', 'reportDetails' =&gt; 'Report Details Page', 'qualitativeAnalysis' =&gt; 'Qualitative Analysis', 'statusSummary' =&gt; 'Status Summary Graphs', 'existingConditions' =&gt; 'Existing Conditions Graphs', 'priorityActions' =&gt; 'Priority Action Plans', 'employeeEngagement' =&gt; 'Employee Engagement Benchmarks', 'futureDiscussions' =&gt; 'Future Discussions' ), 'label' =&gt; 'Report Sections: ', 'multiple' =&gt; true, 'expanded' =&gt; true )) -&gt;add('processReport', 'submit', array( 'label' =&gt; 'Process Report' )); $formModifier = function(FormInterface $form, \Save\ReportBundle\Entity\Report $report){ $filters = $data-&gt;getClient()-&gt;getClientAreas(); $orders = $data-&gt;getClient()-&gt;getOrders(); $form-&gt;add('order', 'entity', array( 'class' =&gt; 'Save\OrderBundle\Entity\Orders', 'property' =&gt; 'selectLabel', 'choices' =&gt; $orders )) -&gt;add('reportFilter', 'entity', array( 'class' =&gt; 'Save\ClientBundle\Entity\ClientArea', 'property' =&gt; 'name', 'choices' =&gt; $filters )); }; $builder-&gt;addEventListener( FormEvents::PRE_SET_DATA, function(FormEvent $event){ $form = $event-&gt;getForm(); $data = $event-&gt;getData(); $formModifier($event-&gt;getForm(), $data); }); $builder-&gt;get('client')-&gt;addEventListener( FormEvents::POST_SUBMIT, function(FormEvent $event) use ($formModifier){ $report = $event-&gt;getForm()-&gt;getData(); $filters = $report-&gt;getClient()-&gt;getClientAreas(); $orders = $report-&gt;getClient()-&gt;getOrders(); $formModifier($event-&gt;getForm()-&gt;getParent(), $report); }); } public function setDefaultOptions(OptionsResolverInterface $resolver) { $resolver-&gt;setDefaults(array( 'data_class' =&gt; 'Save\ReportBundle\Entity\Report' )); } public function getParent() { return 'form'; } public function getName() { return 'reportsettingstype'; } } ?&gt; </code></pre> <p>The problem lies with this line <code>$formModifier($event-&gt;getForm(), $data);</code> When it calls this line I get the following message </p> <pre><code>FatalErrorException: Error: Function name must be a string in [FILE DIRECTORY]/ReportSettingsType.php line 55 </code></pre> <p>I have looked at the PHP documentation on anonymous functions here <a href="http://php.net/manual/en/functions.anonymous.php" rel="nofollow">http://php.net/manual/en/functions.anonymous.php</a> which utilize the PHP Closure class. According to everything I've been able to find so far, this should work the way it is written but I am at my wits end trying to figure this one out.</p> <p>Any constructive help would be greatly appreciated</p>
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