fgets

(PHP 3, PHP 4, PHP 5)

fgets -- Gets line from file pointer

Description

string fgets ( resource handle [, int length] )

Returns a string of up to length - 1 bytes read from the file pointed to by handle. Reading ends when length - 1 bytes have been read, on a newline (which is included in the return value), or on EOF (whichever comes first). If no length is specified, it will keep reading from the stream until it reaches the end of the line.

If an error occurs, returns FALSE.

Common Pitfalls:

People used to the 'C' semantics of fgets() should note the difference in how EOF is returned.

Filens pointer skal være gyldig, og skal pege på en fil, der er succesfuldt åbnet af fopen() eller fsockopen().

A simple example follows:

Eksempel 1. Reading a file line by line

<?php
$handle
= @fopen("/tmp/inputfile.txt", "r");
if (
$handle) {
    while (!
feof($handle)) {
        
$buffer = fgets($handle, 4096);
        echo
$buffer;
    }
    
fclose($handle);
}
?>

Bemærk: The length parameter became optional in PHP 4.2.0. Until PHP 4.3.0, omitting it would assume 1024 as the line length. If the majority of the lines in the file are all larger than 8KB, it is more resource efficient for your script to specify the maximum line length.

Bemærk: This function is binary safe as of PHP 4.3. Earlier versions were not binary safe.

Bemærk: Hvis du har problemer med at PHP ikke genkender endelserne på linier når du læser fra filer som er oprettet på en Macintosh computer, er er du muligt du skal aktivere auto_detect_line_endings konfigurations direktivet.

See also fgetss() fread(), fgetc(), stream_get_line(), fopen(), popen(), fsockopen(), and stream_set_timeout().