file open for read/write

[chaitanyajakhad]

Hi,
I want to read entire file in string, make changes in the string and overwrite whole string into the file .

I tried using r+ flag and fseek.
I tried w+ but it is not usefull.

Does anybody knows trick to achieve this.

Regards,
Chaitanya

[rIkLuNd]

<?php

$fp = fopen( "file.php" , 'r' );
$str = fread( $fp , filesize( "file.php" ) );
$fp = fclose( $fp );

// Manipulate the string here

$fp = fopen ( "file.php" , 'w' );
$write = fwrite( $fp , $str );
$fp = fclose( $fp );

?>

[dar-k]

$fp = fopen('file.txt','w');
fwrite($fp,$string);
fclose($fp);

Does PHP have edit rights to the file?

[chaitanyajakhad]

Hi,
Thanx for help. But I want read and wirite in same transaction.
That is when I read the data nobody should be able to access the file tille I write it back. flock is no much helpfull

Regards,
Chaitanya

[rIkLuNd]

try this:

<?php

$str = @implode( "" , @file( "file.php" ) );

// Manipulate the string here

$fp = fopen ( "file.php" , 'w' );
$write = fwrite( $fp , $str );
$fp = fclose( $fp );

?>

You could also delete the file while you're manipulating the string. Then no-one can access it... 😉

[chaitanyajakhad]

Done.

Run this file first
<?php
$fp = fopen("file.php", 'r');
flock($fp,2);
$str = fread( $fp , filesize( "file.php" ) );
//$fp = fclose( $fp );
sleep(10);
echo $str."\n";
$str = "abcd";
$fp = fopen ("file.php",'w');
$write = fwrite( $fp , $str );
flock($fp,3);
$fp = fclose( $fp );
echo $str."\n";
?>

Then immediately run this file.

<?php
$fp = fopen("file.php", 'r');
flock($fp,2);
$str = fread( $fp , filesize( "file.php" ) );
flock($fp,3);
$fp = fclose( $fp );
echo $str;
?>

🙂