Errors and Warnings in php 7 test

Hello,

In testing the migration of my Kleo site to a new host, we also tested for php7 compatibility.

We received several errors:

KLEO:

FILE: /home/mitchc29/public_html/macsitetest4/wp-content/themes/kleo/woocommerce/cart/cross-sells.php

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FOUND 1 ERROR AFFECTING 1 LINE

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42 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and prohibited since PHP 5.4

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FILE: /home/mitchc29/public_html/macsitetest4/wp-content/themes/kleo/woocommerce/single-product/up-sells.php

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FOUND 1 ERROR AFFECTING 1 LINE

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43 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and prohibited since PHP 5.4

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FILE: /home/mitchc29/public_html/macsitetest4/wp-content/themes/kleo/woocommerce/single-product/related.php

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FOUND 1 ERROR AFFECTING 1 LINE

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43 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and prohibited since PHP 5.4

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FILE: /home/mitchc29/public_html/macsitetest4/wp-content/themes/kleo/kleo-framework/options/inc/browser.php

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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE

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113 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.

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FILE: /home/mitchc29/public_html/macsitetest4/wp-content/themes/kleo/kleo-framework/options/inc/validation/preg_replace/validation_preg_replace.php

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FOUND 1 ERROR AFFECTING 1 LINE

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30 | ERROR | preg_replace() – /e modifier is deprecated since PHP 5.5 and removed since PHP 7.0

Is there anything special I need to do for Kleo to be php7 compatible?

Thank you.