PHP preg_match “AND” operator

问题

I use "OR" operator "|" to match onle of the words of $name variable

$name = "one five six two";
if (preg_match('/(one|two)/i', $name)) {return true;}

What operator should I use with preg_match to have "AND" condition if that words is inside of $name?

i.e.

if (preg_match('/(two "AND" five)/i', $name)) {return true;}

回答1:

If you still want to use regex, you'll need positive lookaheads:

if (preg_match('/^(?=.*one)(?=.*two)/i', $name)) {return true;}

It's not recommended for simple stuff (kind of overkill), and it gets messy with more complex stuff...

回答2:

I think you just need to separate two conditions and use && as follow

if(preg_match('/(two)/i', $name) && preg_match('/(five)/i', $name)) {return true;}

Learn more here

回答3:

You might just do this without resorting to regular expressions:

if (strpos($name, 'one') !== false && strpos($name, 'two') !== false) {
   // do something
}

回答4:

if ( preg_match('/two/i', $name) && preg_match('/five/i', $name) ) {return true;}

回答5:

Don't use preg_match if you only match one word. Regular expression use more computer resources compared to strpos.

Do not use preg_match() if you only want to check if one string is contained in another string. Use strpos() or strstr() instead as they will be faster. (PHP.net).

if (str_pos($name, 'two') !== false 
    && str_pos($name, 'five') !== false) {

    return true;
}

来源：https://stackoverflow.com/questions/22222574/php-preg-match-and-operator

标签

php

regex

preg-match