Find if substring exists in a string

php regex string substr
bahamut100 picture bahamut100 · Aug 4, 2011 · Viewed 29.9k times · Source

I have a lot of strings, and I need to check if each of them contains a color.

For example :

  • A bird in the sky
  • 22 street of France
  • The dog is blue
  • The cat is black and white

So, the two last strings must return true.

What is the best way to find it?

Regex, or check with any substr() ?

Answer

Quasdunk picture Quasdunk · Aug 4, 2011

I always work with strpos since it seems to be the fastest alternative (don't know about regex though).

if(strpos($haystack, $needle) !== FALSE) return $haystack;

Related questions

Remove new lines from string and replace with one empty space

$string = " put returns between paragraphs for linebreak add 2 spaces at end "; Want to remove all new lines from string. I've this regex, it can catch all of them, the problem is I don't know with which function should I use …

Read More
PHP string "contains"

What would be the most efficient way to check whether a string contains a "." or not? I know you can do this in many different ways like with regular expressions or loop through the string to see if it contains …

Read More
How to remove non-alphanumeric characters?

I need to remove all characters from a string which aren't in a-z A-Z 0-9 set or are not spaces. Does anyone have a function to do this?

Read More