how to insert a new line into the begin of file?

[alan123]

I have a text file, and want to insert line "<?php ... ?>" by PHP to the top of this file, I tried:

$file = "test.txt";
$fp = fopen($file,'r+');
$newline = "<?php echo "$abc"; ?>";
fwrite($fp,$newline);
fclose($fp);

but this will replace the character in text.txt with new line added, I need insert this line instead of replacement.
how can I do that?

 

[lgarner]

I think you need to read the file into a temp variable, or use a temp file.

 

[orx57]

Hello

It's effectively necessary to pass by a temporary variable =)

1   <?php 
2     $new_line = "some new text here\n"; 
4     file = "file.txt"; 
6     old_lines = file($file); 
8     array_unshift($old_lines,$new_line); 
10    $new_content = join('',$old_lines); 
12    $fp = fopen($file,'w'); 
13    $write = fwrite($fp, $new_content); 
15    fclose($fp); 
16  ?>

@+

 

[DRJ478]

I was at first confused when I read your question - a new line? Oh, A "new line", as an additional line, not a "new line \n" character. Howeverm here's a head up:
Be aware that different OS's use different newline characters. Some use "\n", or "\r\n" or "\n\r".