Condition works separately but not as OR - php

Question

I have two conditional statements that are the following :
if( isset( $query_string['page'] ) && strpos($_SERVER['REQUEST_URI'], '/blog/') !== false && strpos($_SERVER['REQUEST_URI'], '/blog/page/') === false ) {
if( $query->is_main_query() && !$query->is_feed() && !is_admin() && strpos($_SERVER['REQUEST_URI'], '/blog/') !== false && strpos($_SERVER['REQUEST_URI'], '/blog/page/') === false ) {
The last condition in both if statements is :
strpos($_SERVER['REQUEST_URI'], '/blog/page/') === false
I would like to change the last condition for both, which would be in plain English :
If all criteria are matched and the URL contains either '/blog/page/' or '/blog/tag/' do something.
When I interchange the last condition from '/blog/page/' to '/blog/tag/' the code works. As soon as I try to have both at the same time, the code doesn't work anymore.
I've tried to change the && to and and use || for the or condition, in order to keep the right precedence. I have tried to put them between parenthesis in order to handle the precedence, none of them worked.
I even tried :
strpos($_SERVER['REQUEST_URI'], '/blog/page/') || strpos($_SERVER['REQUEST_URI'], '/blog/tag/') === false
Which didn't help either.

Answer 1

<?php
// Your code says "=== false" (doesn't match)
// but your English description says "contains either '/blog/page/' or '/blog/tag/'" (match)
// This assumes you want what your English description says
/**
* Returns a boolean indicating if the given URI part is found
*/
function match($uriPart)
{
return strpos($_SERVER['REQUEST_URI'], $uriPart) !== false;
}
/**
* Returns a boolean indicating if the given URI part is not found
*/
function doesNotMatch($uriPart)
{
return strpos($_SERVER['REQUEST_URI'], $uriPart) === false;
}
// In this case, "match('/blog/')" is redundant because you're checking for other strings which contain it.
// Nevertheless, I'm leaving it as-is.
if( isset( $query_string['page'] ) && match('/blog/') && (match('/blog/page/') || match('/blog/tag/'))) {
...
// In this case, "match('/blog/')" is redundant because you're checking for other strings which contain it.
// Nevertheless, I'm leaving it as-is.
if( $query->is_main_query() && !$query->is_feed() && !is_admin() && match('/blog/') && (match('/blog/page/') || match('/blog/tag/'))) {
...
}