operations with files and arrays

operations with files and arrays

1. this function adds 1 line to the bottom of the file
is it possible to add lines to the top?



$gbfile='gb.txt';

function add($str){
global $gbfile;
$tmp = trim($str);
$fp=fopen($gbfile,'a+');
flock($fp, LOCK_EX);
fwrite($fp, $tmp. "\n");
flock($fp, LOCK_UN);
fclose($fp);
}

2. there is an array consisting of text lines $lines = file ('entries.txt');
how to reverse an array (make first line last, last first and so on)

3.
this function adds 1 line to the bottom of the file
how to rewrite a file (remove contents of a file and write information into a file)?


$gbfile='gb.txt';

function add($str){
global $gbfile;
$tmp = trim($str);
$fp=fopen($gbfile,'a+');
flock($fp, LOCK_EX);
fwrite($fp, $tmp. "\n");
flock($fp, LOCK_UN);
fclose($fp);
}

 

To add lines to the top of a file, use "r+" instead of "a+" in your fopen().

To reverse the order of an array, use $newarray = array_reverse($oldarray, TRUE) . Make sure you have TRUE otherwise your keys won't be preserved.

For the last one, are you talking about simply overwriting a file's contents? If so, use "w+" instead of "a+" in fopen().

 

See http://uk.php.net/manual/en/function.fopen.php for official documentation and examples.

 

Argh, I forgot to mention that ... I had such a witty remark too, "Brought to you in part by PHP.net" LOL