electriic ink
Aug 26 2005, 10:46 AM
How To Read And Write And Filesa simple trick using phpFor this script all you need is a php enabled server, a text document and a basic understanding of php itself: Beginning- Create a text file called name.txt in any directory.
- Change the file permissions to 777
- Create a empty php file in the same directory.
You are now ready to begin reading and writing your files. If you just want to read the file scroll straight down to Reading the File else read through the whole tut  Open The FileBefore you can write to the file, you need to open it: CODE <?
$thefile = "name.txt"; /* Our filename as defined earlier */
$towrite = "Black widgets rule!"; /* What we'll write to the file */
$openedfile = fopen($thefile, "w"); This opens the file name.txt which we created earlier for writing, but you can open it for reading and both. Just replace the w with one of the following: QUOTE(php.net)
r -- Open for reading only; place the file pointer at the beginning of the file.
r+ -- Open for reading and writing; place the file pointer at the beginning of the file.
w -- Open for writing only; place the file pointer at the beginning of the file and truncate the file to zero length. If the file does not exist, attempt to create it.
w+ -- Open for reading and writing; place the file pointer at the beginning of the file and truncate the file to zero length. If the file does not exist, attempt to create it.
You can find more of these at php.net. I have only quoted a few. Also, the fopen() function must be stored as a variable! If you have done what I have said correctly, the file should be opened so now we are ready to write things into it: Writing The FileWriting to the file is very easy. You use the fwrite() function like so: CODE <?
$thefile = "name.txt"; /* Our filename as defined earlier */
$towrite = "Black widgets rule!"; /* What we'll write to the file */
$openedfile = fopen($thefile, "w");
fwrite($openedfile, $towrite); Again, a breeze all it does is write $towrite to $thefile. You must always write the content to the variable with fopen() stored within it not the one just containing the path to the file! Please bare in mind that because of the way we opened the file all information previously stored in the file will be overwritten! Note: I was told that you can use file_put_contents() instead of fwrite(). You use it in the same way as fwrite() except you would use $thefile instead of $openedfile and like file_get_contents() there's no fopen() and fclose()! Only for PHP5+ though. Reading The FileReading a file is even easier. You could go through the fopen() method but I'm gonna show you an easier way: CODE <?
$thefile = "name.txt"; /* Our filename as defined earlier */
$towrite = "Black widgets rule!"; /* What we'll write to the file */
$whatsinthefile = file_get_contents($thefile); ?>
No opening the file, no closing the file. Just that. Closing the fileIf you opened the file using fopen() then you have to close it using fclose(). Simple: CODE <?
$thefile = "name.txt"; /* Our filename as defined earlier */
$towrite = "Black widgets rule!"; /* What we'll write to the file */
$openedfile = fopen($thefile, "w");
fwrite($openedfile, $towrite);
fclose($openedfile);
?> It couldn't be easier than that and if everything is done just as I say there should be no php errors at all Any questions about this tutorial?
Reply
wariorpk
Aug 26 2005, 11:33 AM
That is a nice tutorial you wrote here. If I ever learn php (not likely I am way too lazy) I would look here. Keep up the good work.
Reply
neokid
Aug 27 2005, 01:48 AM
OMG thank you, i had alot of trouble but im a beginner
Reply
shadowdemon
Sep 17 2005, 11:31 AM
were do u write in it
Reply
thablkpanda
Sep 17 2005, 04:19 PM
Nice tut, simple though, I'd expect adding by-line writing and such.. I'd also think you don't want to add '?>' to the end of the previous code boxes, but it's not there... Panda - oh, maybe because it's not the end of the file yet- lol
Reply
Amezis
Sep 17 2005, 04:27 PM
Great tutorial  I'm only a newbie at PHP but I am trying to learn, so thanks alot 
Reply
good-baby
May 2 2006, 11:48 AM
Buddy , a real nice sharing . Infact last night i was just wondering how to read files with .php extension. Tonight i will just try your Tutorial and hope that shuld work for me. however , thanx for such a nice sharing !
Reply
Outsider
May 2 2006, 04:37 PM
QUOTE(cmatcmextra @ Aug 26 2005, 10:46 AM)  How To Read And Write And Filesa simple trick using phpCODE <?
$thefile = "name.txt"; /* Our filename as defined earlier */
$towrite = "Black widgets rule!"; /* What we'll write to the file */
$openedfile = fopen($thefile, "w");
fwrite($openedfile, $towrite);
fclose($openedfile);
?> Any questions about this tutorial? What if I dont want to add the contents but I want to add something? Can I move the file pointer to the end of the following and protect the previously entered contents from being deleted? For example: Say I have a website. I have made a form in which people can send me messages. I could use mail() to get it as a mail message. But I want to store such info in a single file one after the other. Is it possible? Another question : Does it support multi-line passages? i.e. Can many lines be sotred in a single file?
Reply
jlhaslip
May 2 2006, 06:39 PM
QUOTE What if I dont want to add the contents but I want to add something?
Can I move the file pointer to the end of the following and protect the previously entered contents from being deleted?
Use $openedfile = fopen($thefile, "a+"); QUOTE
I have made a form in which people can send me messages.
I could use mail() to get it as a mail message.
NO, send the email is seperate function, but you could write the information to a file at the same time, then you have a copy in case the email fails to send or gets lost. QUOTE
But I want to store such info in a single file one after the other.
See above. Check the link posted above that goes to the php.net page. All the possible choices are listed there. Use one that will 'append' to the file. either "a" or "a+" will work. QUOTE
Another question : Does it support multi-line passages?
Yes, add newline and or return-line characters to the message body or use comma seperated values format with a unique character string as a seperator. QUOTE
i.e. Can many lines be sotred in a single file? As many as the File Manager will allow you to have for your system on the server. On a LInux based Apache server like the one here at the Trap, LOTS.
Reply
Outsider
May 3 2006, 04:12 PM
Thanks for all the support. I will be putting the above tips into action.
Reply
Latest Entries
GaiaZone
Jan 12 2008, 12:40 AM
Great! You see, after I read this I questioned myself if this could be used to create new pages on a website, apparently, it is possible. For example, you have a member register for your site, lets say a Blog site, and when they confirm the account a new page will be written and saved to be used as his "Blog Page". I'm not sure if this is the most efficient way to do this or not, but it might just work. 
Reply
anachro
Jan 11 2008, 11:01 PM
I read on read & write a bit before; This is a good tutorial, thank you for posting it. also good measure posting the link to the origional, but skipping some info will just leave you with more questions to answer (not for next time you make a tutorial)
Reply
rvalkass
Jan 11 2008, 08:28 PM
Yes, just set the file name to something.html and it will work. You could also get it to write PHP scripts I suppose. A self replicating PHP script...
Reply
GaiaZone
Jan 11 2008, 08:11 PM
Ah, that sounds excellent! So the filename would be "name.html" then, right? Also, if the HTML document is possible to create, that means that I could create PHP scripts also?
Reply
rvalkass
Jan 11 2008, 07:06 AM
An HTML document is just a text document. As long as you worked out all the HTML code beforehand, you could use PHP to put that into a file. You also have the advantage of being able to use loops, which are excellent for doing tables and lists - you only need to write the HTML code for one line, and PHP puts different data in, then repeats it.
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