Make Brickyard Premium PHP7 compatible

I’d like to be able to run my site on PHP7 to take advantage of it’s faster processing times but Brickyard is not PHP7 compliant according to the ‘PHP Compatibility Checker’ plugin.

FILE: /public_html/wp-content/themes/brickyard-premium/functions/fe/widget-twitter.php
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FOUND 6 ERRORS AFFECTING 3 LINES
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89 | ERROR | Function eregi_replace() is deprecated since PHP 5.3 and removed since PHP 7.0; use preg_replace instead
89 | ERROR | Extension ‘ereg’ is deprecated since PHP 5.3 and removed since PHP 7.0 – use pcre instead.
90 | ERROR | Function eregi_replace() is deprecated since PHP 5.3 and removed since PHP 7.0; use preg_replace instead
90 | ERROR | Extension ‘ereg’ is deprecated since PHP 5.3 and removed since PHP 7.0 – use pcre instead.
91 | ERROR | Function eregi_replace() is deprecated since PHP 5.3 and removed since PHP 7.0; use preg_replace instead
91 | ERROR | Extension ‘ereg’ is deprecated since PHP 5.3 and removed since PHP 7.0 – use pcre instead.
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FILE: /public_html/wp-content/themes/brickyard-premium/functions.php
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FOUND 34 ERRORS AND 1 WARNING AFFECTING 7 LINES
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1 | WARNING | File has mixed line endings; this may cause incorrect results
24 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
24 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
29 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
29 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
29 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
29 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
39 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
39 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
46 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
46 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
60 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
60 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
62 | ERROR | Function mysql_escape_string() is deprecated since PHP 5.3 and removed since PHP 7.0; use mysqli_real_escape_string instead
62 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
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