Description:
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LDAP does not work with PHP compiled for Mojave. My setup includes PHP and httpd installed and configured via homebrew and was working as per usual without an issue until I updated to Mojave and updated PHP from 7.2.9 -> 7.2.10. The upgrade pulled down a new set of compiled PHP components and in doing broke LDAP. The following error is received (apache error logs) alongside a `ERR_EMPTY_RESPONSE` in the browser when running the test script below:

    Assertion failed: (LDAP_VALID( ld )), function ldap_unbind_ext, file unbind.c, line 46.
    [Fri Oct 12 13:58:06.122852 2018] [core:notice] [pid 34621] AH00052: child pid 35420 exit signal Abort trap (6)

The issue continued when updating to PHP 7.2.11 and I verified that reverting to older versions including 7.0 no longer worked, even though I have confirmed it working on my system before.

As per the brew formula, PHP is compiled with `--with-ldap=/usr/local/opt/openldap` (openldap also provided via brew). Considering there is a failed assertion as well it is safe to assume that openldap is successfully linked into PHP on compilation.

For further information, see the following discussion on GitHub: https://github.com/Homebrew/homebrew-core/issues/32916

Test script:
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<?php
var_dump(ldap_unbind_ext());

Actual result:
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Assertion failed: (LDAP_VALID( ld )), function ldap_unbind_ext, file unbind.c, line 46.
[Fri Oct 12 13:58:06.122852 2018] [core:notice] [pid 34621] AH00052: child pid 35420 exit signal Abort trap (6)