Fix non-strict checking issue on /wp-admin/includes/upgrade.php file

[faisalahammad]

This PR fixes a non-strict checking issue on line 1419 of the /wp-admin/includes/upgrade.php file in WordPress core. The current code uses the "==" operator instead of the "===" operator, which can lead to unexpected behavior due to type coercion.

To fix this issue, we replace the "==" operator with the "===" operator to perform a strict comparison between the value of the $link->link_category variable and the integer 0. This ensures that the comparison is done in a type-safe way and that unexpected behavior is avoided.

The fixed code is as follows:

<?php
if ( 0 === $link->link_category ) ) {
    continue;
}

With this fix, the code in the upgrade.php file will be more reliable and less prone to unexpected behavior.

This PR fixes a non-strict checking issue on line 1419 of the /wp-admin/includes/upgrade.php file in WordPress core. The current code uses the "==" operator instead of the "===" operator, which can lead to unexpected behavior due to type coercion.

To fix this issue, we replace the "==" operator with the "===" operator to perform a strict comparison between the value of the $link->link_category variable and the integer 0. This ensures that the comparison is done in a type-safe way and that unexpected behavior is avoided.

The fixed code is as follows:

{{{php
if ( 0 === $link->link_category ) ) {

continue;

}
}}}

With this fix, the code in the upgrade.php file will be more reliable and less prone to unexpected behavior.

Trac ticket: https://core.trac.wordpress.org/ticket/58041