Solved

PHP &Mysql encoding problem

Posted on 2014-01-03
4
26 Views
Last Modified: 2016-05-17
I am selecting Arabic and English file names from mysql database...

But the php function is_file() don't recognize the file name, although it can see the English files.

I tried to detect the selected name encoding, found (UTF-8)

$q = mysql_query("select `file` from `my_table` ");

while( $data = mysql_fetch_assoc($q) ){
    
    $file_path = "path_to_file".$data['file'];

    if (is_file ($file_path)){
    
       echo $data['file']." found<br/>";
  
    }

}

Open in new window

0
Comment
Question by:darroosh
4 Comments
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39753257
0
 
LVL 109

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 39753888
Couple of thoughts... PHP was built on the assumption that a character == a byte.  Perhaps this made sense in a 1990's sort of way in western languages, where all 256 characters could be represented by 8 bits (ISO-8859-1), but it ignored most of the world where there can be, literally, thousands of characters needed to communicate meaning.  Palpably something was amiss.

Enter UTF-8 encoding.  Now you can have from one to four bytes in each character.  Below code point 128 the ASCII characters match, so ISO-8859-1 and UTF-8 look the same there.  Above code point 128, UTF-8 characters are multi-byte.  This article explains the details and shows the symptoms of character set collisions.

PHP's assumptions about character sets are changing at Release 5.4, so you may be in for some surprises as you upgrade.  However, the server file system probably still has the 1:1 ratio of byte:character.  I recommend that you use only ASCII characters in file names.  This will guarantee that your names will be in consonance with the 1:1 ratio that prevents collisions between UTF-8 and ASCII.  The recommendation only extends to the file names, not the contents of the files or the SQL tables.  The internal encoding of the data can be UTF-8, no matter what characters are used to name the files.
0

Featured Post

Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
preventing spam with mailto 22 31
How would I do this...? 2 28
does post require a form or curl to be post 4 29
How to change the link of an image using md5 in php ? 3 31
Things That Drive Us Nuts Have you noticed the use of the reCaptcha feature at EE and other web sites?  It wants you to read and retype something that looks like this.Insanity!  It's not EE's fault - that's just the way reCaptcha works.  But it is …
Does the idea of dealing with bits scare or confuse you? Does it seem like a waste of time in an age where we all have terabytes of storage? If so, you're missing out on one of the core tools in every professional programmer's toolbox. Learn how to …
The viewer will learn how to count occurrences of each item in an array.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question