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Can anyone explain the difference in a real life situation between strpos() and strstr()?

Posted on 2011-09-17
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Can anyone explain the difference in a real life situation between strpos() and strstr()?
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Question by:Octalys
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by:jet-black
ID: 36553381
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jet-black earned 2000 total points
ID: 36553395
You can also see by example:

$text = 'string';

The result of
echo strpos($text, 'ri');
is
2

Open in new window


On the other hand, the result of
echo strstr($text, 'ri');
is
ring

Open in new window



strpos will give you position of the the text part you search.
strstr will give you the substring of the text started by the position of the the text part you search (which is equal to strpos() func.'s value) to the final character.
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Expert Comment

by:jet-black
ID: 36553413
So, if you only check if the text part exists in the string, just use strpos() function. It is faster.

There will be times when you will need the strstr() function too.
Here's the example code from the manual:

<?php
$email  = 'name@example.com';
$domain = strstr($email, '@');
echo $domain; // prints @example.com

$user = strstr($email, '@', true); // As of PHP 5.3.0
echo $user; // prints name
?>

Open in new window

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Author Closing Comment

by:Octalys
ID: 36553706
thanks for the answer.
I was looking at the php documentation of both functions, but somehow I couldnt find the difference. Now I see it.

Make sense.

Thanks.
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Expert Comment

by:jet-black
ID: 36553713
You're welcome.
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