Writing to the top of a file.

djdaz

Sounds daft and i know MySQL would be useful here...telelwest dont provide it, but is there a way to use the @fopen/write/close command write what is entered to a file at the top of it?
Thanks

rIkLuNd

There is no command for doing that but it can be done with some effort... 🙂

<?php

// load the content of the file into an array:
$file_data = file( "the_file.txt" );

// the data that should be added to the file:
$data_to_add = "here are some text||some more text||and some ending text\r\n";

// let's add it to the top of the new data array:
$new_data = array();
$new_data[0] = $data_to_add;

// add the rest of the data:
while( list( $key , $val ) = each( $file_data ) )
{
	$new_data[] = $val;
}

// write it to the file:
$p = fopen( "the_file.txt" , "w" );
$w = fwrite( $p , implode( "" , $new_data ) );
$c = fclose( $p );

// print a message:
echo "The writing have been finished!";

?>

laserlight

instead of using file, it might be better to read into a string, insert the extra data to the front of the string, then write the string:

<?php
//define the file and data
$filename = "yourfile.txt";
$extra = "some data";

//open the file for reading
$fp = fopen($filename, "r")
	OR die("Error: could not open file for reading");
$contents = fread($fp, filesize($filename));
fclose($fp);

//add the extra data to the front
//may need to insert a newline character in between
$contents = $extra . $contents;

//open the file for writing
$fp = fopen($filename, "w")
	OR die("Error: could not open file for writing");
if (fwrite($fp, $contents))
	echo 'Contents written';
else
	echo 'Error: contents not written!';
fclose($fp);
?>

conversely, one might use only 1 fopen() call, but you might have to use file locking to be on the safe side.
Still...

<?php
//define the file and data
$filename = "yourfile.txt";
$extra = "some data";

//open the file for reading and writing
$fp = fopen($filename, "r+")
	OR die("Error: could not open file for reading");
$contents = fread($fp, filesize($filename));

//add the extra data to the front
//may need to insert a newline character in between
$contents = $extra . $contents;

//reset the file pointer
rewind($fp);
//now write
if (fwrite($fp, $contents))
	echo 'Contents written';
else
	echo 'Error: contents not written!';
fclose($fp);
?>