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Geek Culture / Question on strings in PHP

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Mistrel
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Posted: 4th Nov 2006 04:27
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Would anyone here be able to help me with a problem? I'm learning PHP and I don't know how to trim a single character off the end of a string.

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indi
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Posted: 4th Nov 2006 04:50 Edited at: 4th Nov 2006 04:55
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similar to string length in db you can use the strlen() function to find the length.

from what i understand there is an explode function as well



and looking again there is a strip function that might help

perhaps getting the length and reading the ascii back in with a loop minus one would do the trick

I found all this looking on the net at the oz php site.


http://au.php.net/strlen

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Mistrel
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Posted: 4th Nov 2006 06:43
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I found a function called rtrim(). This handled it just as well. Thanks.

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indi
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Posted: 4th Nov 2006 07:21
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good work.

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QuothTheRaven
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Posted: 4th Nov 2006 09:11
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From php.net:

Quote: "string rtrim ( string str [, string charlist] )
This function returns a string with whitespace stripped from the end of str. Without the second parameter, rtrim() will strip these characters:
" " (ASCII 32 (0x20)), an ordinary space.
"\t" (ASCII 9 (0x09)), a tab.
"\n" (ASCII 10 (0x0A)), a new line (line feed).
"\r" (ASCII 13 (0x0D)), a carriage return.
"\0" (ASCII 0 (0x00)), the NUL-byte.
"\x0B" (ASCII 11 (0x0B)), a vertical tab."

This does not sound like what you want to do. If you don't know what the character at the end of the string is going to be you'd need to make up a bulky delimiter to catch all possible characters. I think substr() would better suit your needs:

http://us3.php.net/manual/en/function.substr.php
Quote: "$rest = substr("abcdef", 0, -1); // returns "abcde""

just use -1 as the second paramater and it will chop off the last character of any string you give it.

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QuothTheRaven
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Posted: 4th Nov 2006 09:13
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Ok, after trying to edit that last post (sorry if i'm derailing anything), just testing out something:
"\0" Will this text show up if I try to edit the message?

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Richard Davey
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Posted: 4th Nov 2006 12:43
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Quote: "I'm learning PHP and I don't know how to trim a single character off the end of a string."


The easiest way? Like this:

$string = substr($string, 0, -1);

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