fgets
(PHP 4, PHP 5)
fgets — Gets line from file pointer
Description
Gets a line from file pointer.
Parameters
- handle
-
The file pointer must be valid, and must point to a file successfully opened by fopen() or fsockopen() (and not yet closed by fclose()).
- length
-
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.
Note: 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.
Return Values
Returns a string of up to length - 1 bytes read from the file pointed to by handle .
If an error occurs, returns FALSE.
ChangeLog
| Version | Description |
|---|---|
| 4.3.0 | fgets() is now binary safe |
| 4.2.0 | The length parameter became optional |
Παραδείγματα
Example#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);
}
?>
Notes
Note: Αν έχετε προβλήματα με την PHP να μην αναγνωρίζει τα τέλη γραμμών όταν διαβάζει αρχεία σε, ή δημιουργημένα από, ένα Macintosh ηλεκτρονικό υπολογιστή, μπορεί να θέλετε να ενεργοποιήσετε την run-time επιλογή ρύθμισης auto_detect_line_endings.
Note: People used to the 'C' semantics of fgets() should note the difference in how EOF is returned.