Re: [PHP] string comparison
On Sun, 2008-07-13 at 21:47 +0530, Sudhakar wrote: hi i am writing a small application where a user enters a phrase in the textfield and i would like to display all the files present in the root directory which consists of the keyword or keywords entered by the user. i have used a few comparison functions but i am not getting the expected result. $my_file = file_get_contents(filename.html); what ever the user enters whether it is a single word or few words i would like to compare with $my_file in a case insensitive manner. can anyone suggest the best method and how to go about. I don't suggest using file_get_contents. It would probably be more efficient (at least less memory intensive) to use fopen() and fread(). Just be sure you overlap each read by $the_size_of_the_largest phrase_or_keyword - 1. Then use stripos() for matching... of course that won't work so well if whitespace doesn't need to match exactly in phrases. In which case you'll need to resort to other techniques. Cheers, Rob. -- http://www.interjinn.com Application and Templating Framework for PHP -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] string comparison
On Jul 13, 2008, at 9:17 AM, Sudhakar wrote:
hi
i am writing a small application where a user enters a phrase in the
textfield and i would like to display all the files present in the
root
directory which consists of the keyword or keywords entered by the
user.
i have used a few comparison functions but i am not getting the
expected
result.
I use this script to list archive files from a directory based on
keyword. I'd guess a modified version using the keywords from users
might work:
// create archives box
if ($handle = opendir('../diaryarchives/')) {
while (false !== ($file =
readdir($handle))) {
$pos = strpos($file, diary_);
$pagemarked = diary._;
if ($pos !== false) {
//print $filebr;
$file_name = ereg_replace
($pagemarked,,$file);
$file_name = ereg_replace
(.php,,$file_name);
//print * $file_namebr;
//print $filebr;
$archive_list_gather[] = 'lia href=/diaryarchives/'.
$file.''.$file_name.'/a/li';
}
}
closedir($handle);
}
rsort($archive_list_gather);
foreach($archive_list_gather as $value) {
$archive_list .= $value;
}
// build archives box
$archives_box = 'div id=diary-archives
h3 class=sideimg src=/images/h3s_diaryarchives.gif
alt=Diary Archives width=225 height=20 //h3
ul
'.$archive_list.'
/ul
/div';
// publish archives box
$filename = PATHA.'/diaryarchivesbox.php';
publishpages($archives_box, $filename);
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RE: [PHP] string comparison
Strcmp() is case sensitive. So use it when you need a case sensitive
comparison.
---John Holmes...
-Original Message-
From: Bas Jobsen [mailto:[EMAIL PROTECTED]]
Sent: Saturday, July 27, 2002 12:35 PM
To: PHP General
Subject: [PHP] string comparison
Hello,
When should i prefer strcmp() above == or !=?
I have test it out (see code below).
But a == comparison seems to be faster always.
First i thought is was cause, if(strcmp($1,$2)!=0),
needs two comparisons (strcmp and !=). But even
if($1!=$2) is faster then if(strcmp($1,$2)).
Thanks,
Bas Jobsen
?
function getmicrotime(){
list($usec, $sec) = explode( ,microtime());
return ((float)$usec + (float)$sec);
}
$t1='hello';
$t2='hello';
$t3='hallo';
?
1000x:?
$start=getmicrotime();
for($a=0; $a10; $a++) if(strcmp($t1,$t3));//nonmatch
echo getmicrotime()-$start;
?
br
1000x:?
$start=getmicrotime();
for($a=0; $a10; $a++) if($t1!=$t3);//nonmatch
echo getmicrotime()-$start;
?
br
1000x:?
$start=getmicrotime();
for($a=0; $a10; $a++) if(!strcmp($t1,$t3));//match
echo getmicrotime()-$start;
?
br
1000x:?
$start=getmicrotime();
for($a=0; $a10; $a++) if($t1==$t3);//match
echo getmicrotime()-$start;
?
br
1000x:?
$start=getmicrotime();
for($a=0; $a10; $a++) if(strcmp($t1,$t2));//nonmatch
echo getmicrotime()-$start;
?
br
1000x:?
$start=getmicrotime();
for($a=0; $a10; $a++) if($t1!=$t2);//nonmatch
echo getmicrotime()-$start;
?
br
1000x:?
$start=getmicrotime();
for($a=0; $a10; $a++) if(!strcmp($t1,$t2));//match
echo getmicrotime()-$start;
?
br
1000x:?
$start=getmicrotime();
for($a=0; $a10; $a++) if($t1==$t2);//match
echo getmicrotime()-$start;
?
br
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Re: [PHP] String Comparison
oh wait.. I just realize my goof it is treating it like I want to
divide image by pjpeg. LMAO
*sigh* I guess I should just go home while I'm ahead. haha
-Jason
- Original Message -
From: Jason Bell [EMAIL PROTECTED]
To: PHP Users [EMAIL PROTECTED]
Sent: Tuesday, July 24, 2001 3:59 PM
Subject: [PHP] String Comparison
Hello.
I'm trying to compare two strings, and performa function if the are the
same. Easy right? I thought so until I tried it...
$query = select type from images where id=$id;
$result = mysql_query($query);
$type = mysql_result($result,0,type);
print $type;
if (image/pjpeg == $type) { print Type is JPG; };
returned:
image/pjpeg
Warning: Division by zero in /home/daelic/www/photo/mkthumb.php on line 8
Any idea on why this won't work?
Thanks!
Jason
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Re: [PHP] String Comparison
On Tuesday 24 July 2001 23:59, Jason Bell wrote:
if (image/pjpeg == $type) { print Type is JPG; };
you need to put image/jpeg in quotes.
Ideally you would also do a safer string comparison than ==
eg if(!strcmp('image/jpeg',$type))
--
Phil Driscoll
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