The only one of these That I believe would cause you to be unable to view the site would be the redirect issue - is the site redirected to another site? But both of these would occur regardless of PHP version as far as I am aware.
That is the issue when I switch to PHP 5.6, i could access the site, the only issue that I experience on the site is that when people tends to navigate to some pages after some time it will just freeze and continue loading until you go back to the home page.
But when I check the error log file on the public_html, i found the issue to be related to mysql soap files about 9 of them that I posted at the beginning of this thread. However despite that I am able to enter into the site. But on switching to any of the PHP 7 version the only thing I see on the site is
"There has been a critical error on your website. Please check your site admin email inbox for instructions."
On checking the error log file on the public_html I found that they also have related issue as below, with only 5 (.so) files affected
PHP Warning: PHP Startup: Unable to load dynamic library 'mcrypt.so' (tried: /opt/cpanel/ea-php74/root/usr/lib64/php/modules/mcrypt.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/mcrypt.so: cannot open shared object file: No such file or directory), /opt/cpanel/ea-php74/root/usr/lib64/php/modules/mcrypt.so.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/mcrypt.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library 'mysqlnd_mysql.so' (tried: /opt/cpanel/ea-php74/root/usr/lib64/php/modules/mysqlnd_mysql.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/mysqlnd_mysql.so: cannot open shared object file: No such file or directory), /opt/cpanel/ea-php74/root/usr/lib64/php/modules/mysqlnd_mysql.so.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/mysqlnd_mysql.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library 'mysqlnd_mysqli.so' (tried: /opt/cpanel/ea-php74/root/usr/lib64/php/modules/mysqlnd_mysqli.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/mysqlnd_mysqli.so: cannot open shared object file: No such file or directory), /opt/cpanel/ea-php74/root/usr/lib64/php/modules/mysqlnd_mysqli.so.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/mysqlnd_mysqli.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library 'pdo_mysqlnd.so' (tried: /opt/cpanel/ea-php74/root/usr/lib64/php/modules/pdo_mysqlnd.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/pdo_mysqlnd.so: cannot open shared object file: No such file or directory), /opt/cpanel/ea-php74/root/usr/lib64/php/modules/pdo_mysqlnd.so.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/pdo_mysqlnd.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library 'wddx.so' (tried: /opt/cpanel/ea-php74/root/usr/lib64/php/modules/wddx.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/wddx.so: cannot open shared object file: No such file or directory), /opt/cpanel/ea-php74/root/usr/lib64/php/modules/wddx.so.so (/opt/cpanel/ea-php74/root/usr/lib64/php/modules/wddx.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
[08-May-2020 21:23:41 UTC] PHP Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /.../.../public_html/wp-includes/wp-db.php:1661
Could it be a database issue?