Gossamer Forum: General: Internet Technologies: String Operators (PHP)

Aug 31, 2003, 7:16 PM

Stealth

Veteran (17240 posts)

Aug 31, 2003, 7:16 PM

Post #1 of 8

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String Operators (PHP)

Hello.

I just want to double check with those PHP experts out there in terms of using the . to find out whether a string "contains" some string.

I did read the following web page:

http://us4.php.net/...age.operators.string

I am using the following codes in one of my PHP scripts:

Code:
if ($destination . "sometext") {

It seems to do what I want, but not sure if that's the most efficient method of finding out whether a string contains some text.

Thanks in advance.
========================================
Buh Bye!

Cheers,
Me

Aug 31, 2003, 7:21 PM

hennagaijin

User (425 posts)

Aug 31, 2003, 7:21 PM

Post #2 of 8

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Re: [Stealth] String Operators (PHP) In reply to

I've never seen the concatenation operator used in that way, but I guess if it works, why not?

I would normally just use the strstr function for this.

Fractured Atlas :: Liberate the Artist
Services: Healthcare, Fiscal Sponsorship, Marketing, Education, The Emerging Artists Fund

Aug 31, 2003, 7:31 PM

Alex

Administrator (9387 posts)

Aug 31, 2003, 7:31 PM

Post #3 of 8

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Re: [Stealth] String Operators (PHP) In reply to

I don't think that's what you want. "." will concat two strings to together (join them into one string). It won't tell you if one contains the other.

I think you want strstr like recommended by hennagaijin .

Cheers,

Alex
--
Gossamer Threads Inc.

Aug 31, 2003, 8:48 PM

Stealth

Veteran (17240 posts)

Aug 31, 2003, 8:48 PM

Post #4 of 8

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Re: [Alex] String Operators (PHP) In reply to

Thanks, hennagaijin and Alex.

Yes, strstr function seems to be a more efficient method of doing it. I'll take a closer look at the PHP site web page and see if I can't improve the codes I am using...

Thanks.
========================================
Buh Bye!

Cheers,
Me

Sep 1, 2003, 1:27 PM

Stealth

Veteran (17240 posts)

Sep 1, 2003, 1:27 PM

Post #5 of 8

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Re: [Stealth] String Operators (PHP) In reply to

Welp, strstr function didn't really do the trick for me...so I used strpos function:

Code:
$pos = strpos($destination, 'sometext'); 
if ($pos == true) { 
     OTHER CONDITIONS 
}

works just fine....you were correct, Alex, the . string operator didn't really check to see if the text was within the string.

Sep 1, 2003, 1:33 PM

Andy

Veteran / Moderator (18441 posts)

Sep 1, 2003, 1:33 PM

Post #6 of 8

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Re: [Stealth] String Operators (PHP) In reply to

Could also use preg_match();

Code:
$string "see if we can find This"; 

if (preg_match("/find this/i",$string,$var)) {  
   do_this();  
}

Cheers

Andy (mod)
andy@ultranerds.co.uk

Sep 1, 2003, 4:51 PM

hennagaijin

User (425 posts)

Sep 1, 2003, 4:51 PM

Post #7 of 8

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Re: [Andy] String Operators (PHP) In reply to

If you don't actually need to use regex matching, the straight-up string matching functions should be more efficient.

Fractured Atlas :: Liberate the Artist
Services: Healthcare, Fiscal Sponsorship, Marketing, Education, The Emerging Artists Fund

Sep 1, 2003, 9:45 PM

Stealth

Veteran (17240 posts)

Sep 1, 2003, 9:45 PM

Post #8 of 8

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Re: [hennagaijin] String Operators (PHP) In reply to

Good points...yes, I don't need to use regular expression pattern matching...just checking that the redirection var string ($direction) contains a certain string of text in order to check other conditions...
========================================
Buh Bye!

Cheers,
Me