php if语句或运算符

Question

I'm trying to build up a php if statement with or "||" operators but doesn't seems to work

   $country_code ="example_country_code";

   if ( $country_code != 'example_country_code' || !clientIscrawler()) {
            echo 'the script can be executed';
   }
   else {   
     echo 'skipping';
   }

with the given example should be echoed skipping but doesn't happening like that. What I'm doing wrong?

Answer 1

Perhaps the double negatives is giving you problems, let's rewrite it to:

!($country_code == 'example_country_code') || !clientIscrawler()

This can be turned into an equivalent condition with &&:

!($country_code == 'example_country_code' && clientIscrawler())

By reversing the if you would get this:

if ($country_code == 'example_country_code' && clientIscrawler()) {
    echo 'skipping';
} else {
    echo 'the script can be executed';
}

Therefore, in your code, it will only print skipping if clientIscrawler() is truthy.