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PHP ProgrammingBy James N HitzReading From Files With fread()Reading file contents is done using the fread() function as follows: $fileContents = fread("file_to_read", bytes_to_read); The first argument - "file_to_read" is a file handle pointing to a previously opened file (of course you can't read a closed file). PS: "file_to_read" is a file pointer (filehandle) and NOT a file name!! The second argument (bytes_to_read) specifies how much content you want to read from a file. If you want to read the entire file and you don't know how big it is, use PHP's filesize(): $filesize = filesize(filename) Here the filesize() function expects you to specify the filename AND NOT the filehandle (file pointer). This will need a little getting used to. Lets take an example. The following example opens a file, reads the contents and prints them out, before finally closing the file: <HTML><HEAD><TITLE>using data files with PHP</TITLE></HEAD> <BODY bgcolor="black" text="white"> <?php $file2access="/www/home/list.txt"; //our data file. if(!$filehandle = fopen($file2access,'r')){ print "Error. Could not open $file2access in read only mode"; }else { /* file opened ok. Read contents but first get file size */ $contents = fread($filehandle,$filesize); print "The contents of <B>$file2access</B>are:<BR>". "<BLOCKQUOTE><B>$contents</B></BLOCKUOTE>"; //close file if(!fclose ($filehandle)){ print "<P>Error. Cannot close file <b>$file2access</b>"; } } ?> <BODY></HTML> |
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The author has tried his level best to keep the contents in this web site as accurate as possible. This does not however mean that you CANNOT find an error or an in-accuracy. He is only human for heaven's sake. Please let him know by emailing him at james@ncts.zzn.com
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