Tribe evetbrite tickets plugin hack to work with php 5.4 - Edit the file tribe-eventbrite.class.php form the line 1268 to 1302

tribe-eventbrite.class.php

<?php
public function payment_update( $postId, $eventId, $raw_post ) {
  $paymentTypes = array('check' => '', 'cash' => '', 'invoice' => '');
  $requestParams = 'event_id=' . $eventId;

  // make it accept cash if free & assign a message
  if ( 2 == $raw_post['EventBriteIsDonation'] ) {
    $requestParams .= '&accept_cash=1';
    $requestParams .= '&instructions_cash=' . urlencode( __( 'This event is free to attend', 'tribe-eventbrite' ) );
  } else {
    // otherwise loop through the payment methods as it's supposed to
    foreach( $paymentTypes as $key => $val ) {
      $onOff = $raw_post['EventBritePayment_accept_' . $key];
      if ( $onOff ) $requestParams .= '&accept_' . $key . '=' . $onOff;
      $paymentTypes[$key] = $onOff;
    }
    foreach( $paymentTypes as $key => $val ) {
      if ( $val ) {
        $instructions = $raw_post['EventBritePayment_instructions_'.$key];
        if ( $instructions ) $requestParams .= '&instructions_' . $key . '=' . urlencode( stripslashes( $instructions ) );
      }
    }

    // Online payment method is either/or (not both)
    $onlineMethod = $raw_post['EventBritePayment_accept_online'];
    if ( !empty( $raw_post['EventBritePayment_accept_online'] ) ) {
      switch( $onlineMethod ) {
        case 'paypal':
          $requestParams .= '&accept_paypal=1&paypal_email=' . $raw_post['EventBritePayment_paypal_email'];
          break;
        case 'google':
          $requestParams .= '&accept_google=1&google_merchant_id=' . $raw_post['EventBritePayment_google_merchant_id'] . '&google_merchant_key=' . $raw_post['EventBritePayment_google_merchant_key'];
          break;
      }
    }
  }

  $response_arr = self::sendEventBriteRequest( 'payment_update', $requestParams, $postId );
  if (WP_DEBUG) error_log("PAYMENT OPTIONS" . print_r($response_arr, true));
}