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fileatime> <file_put_contents
[edit] Last updated: Sat, 07 Jan 2012

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file

(PHP 4, PHP 5)

fileLiest eine komplette Datei in ein Array

Beschreibung

array file ( string $filename [, int $flags = 0 [, resource $context ]] )

Liest eine komplette Datei in ein Array

Hinweis:

Sie können file_get_contents() benutzen, um den Inhalt einer Datei als String zurückgeliefert zu bekommen.

Parameter-Liste

filename

Pfad zur Datei.

Tipp

Mit dieser Funktion können Sie eine URL als Dateinamen verwenden, falls Sie fopen wrappers ermöglicht haben. Mehr Details dazu, wie Sie den Dateinamen angeben müssen finden Sie bei fopen(). Eine Liste der unterstützten URL Protokolle, die Fähigkeiten der verschiedenen Wrapper, Hinweise zu deren Verwendung und Informationen zu den eventuell vorhandenen vordefinierten Variablen finden Sie unter Unterstützte Protokolle and Wrappers.

flags

Der optionale Parameter flags kann aus einer oder mehreren der folgenden Konstanten bestehen:

FILE_USE_INCLUDE_PATH
Suche nach der Datei im include_path
FILE_IGNORE_NEW_LINES
Zeilenende nicht am Ende jedes Array-Elements einfügen
FILE_SKIP_EMPTY_LINES
Leere Zeilen überspringen

context

Eine Context-Ressource, die mit der stream_context_create()-Funktion erstellt wurde.

Hinweis: Die Kontext-Unterstützung gibt es seit PHP 5.0.0. Eine Beschreibung von Kontexten finden Sie unter Stream Funktionen.

Rückgabewerte

Gibt die Datei in einem Array zurück. Jedes Element des Arrays entspricht einer Zeile in der Datei, ohne dass das Zeilenende entfernt wird. Im Fehlerfall gibt file() FALSE zurück.

Hinweis:

Jede Zeile in dem resultierenden Array enthält das Zeilenende, außer es wird FILE_IGNORE_NEW_LINES verwendet; daher müssen Sie trim() verwenden, falls das Zeilenende nicht vorhanden sein soll.

Hinweis: Wenn Sie Probleme damit haben, dass PHP Zeilenendezeichen nicht erkennt, entweder beim Lesen von Dateien auf einem Macintosh oder bei Dateien, die auf einem Macintosh erstellt wurden, können Sie die Option auto_detect_line_endings aktivieren.

Changelog

Version Beschreibung
5.0.0 Der context-Parameter wurde hinzugefügt.
5.0.0 Prior to PHP 5.0.0 the flags parameter only covered include_path and was enabled with 1
4.3.0 file() wurde binär-sicher.

Beispiele

Beispiel #1 file()-Beispiel

<?php
// Liest eine Datei in ein Array. Hier gehen wir über HTTP, um den
// HTML-Quelltext einer URL zu bekommen
$lines file('http://www.example.com/');

// Durchgehen des Arrays und Anzeigen des HTML-Quelltexts inkl. Zeilennummern
foreach ($lines as $line_num => $line) {
    echo 
"Line #<b>{$line_num}</b> : " htmlspecialchars($line) . "<br>\n";
}

// Ein weiteres Beispiel: Einlesen einer Webseite in einen String.
// Siehe auch file_get_contents().
$html implode (''file ('http://www.example.com/'));

// Benutzung des optionalen flags-Parameters seit PHP 5
$trimmed file('somefile.txt'FILE_IGNORE_NEW_LINES FILE_SKIP_EMPTY_LINES);
?>

Anmerkungen

Warnung

Bei SSL-Verbindungen zusammen mit Microsoft IIS hält sich dieser Webserver nicht an das Protokoll und schließt die Verbindung ohne ein close_notify zu senden. PHP quittiert dieses Fehlverhalten mit "SSL: Fatal Protocol Error", wenn das Ende der Daten erreicht ist. Eine mögliche Lösung besteht darin, den Level von error_reporting herabzusetzten und Warnings auszuschließen. Ab PHP 4.3.7 kann PHP fehlerhafte IIS-Serversoftware erkennen, wenn Sie einen Stream mit dem https://-Wrapper öffnen, und unterdrückt die Warnung für Sie. Falls Sie fsockopen() benutzen, um einen ssl://-Socket zu öffnen, müssen Sie selbst dafür Sorge tragen, die Warnung zu erkennen und diese zu unterdrücken.

Siehe auch



fileatime> <file_put_contents
[edit] Last updated: Sat, 07 Jan 2012
 
add a note add a note User Contributed Notes file
twichi at web dot de 13-Sep-2011 12:33
read from CSV data (file) into an array with named keys

... with or without 1st row = header (keys)
(see 4th parameter of function call as  true / false)

<?php
// --------------------------------------------------------------

function csv_in_array($url,$delm=";",$encl="\"",$head=false) {
   
   
$csvxrow = file($url);   // ---- csv rows to array ----
   
   
$csvxrow[0] = chop($csvxrow[0]);
   
$csvxrow[0] = str_replace($encl,'',$csvxrow[0]);
   
$keydata = explode($delm,$csvxrow[0]);
   
$keynumb = count($keydata);
   
    if (
$head === true) {
   
$anzdata = count($csvxrow);
   
$z=0;
    for(
$x=1; $x<$anzdata; $x++) {
       
$csvxrow[$x] = chop($csvxrow[$x]);
       
$csvxrow[$x] = str_replace($encl,'',$csvxrow[$x]);
       
$csv_data[$x] = explode($delm,$csvxrow[$x]);
       
$i=0;
        foreach(
$keydata as $key) {
           
$out[$z][$key] = $csv_data[$x][$i];
           
$i++;
            }   
       
$z++;
        }
    }
    else {
       
$i=0;
        foreach(
$csvxrow as $item) {
           
$item = chop($item);
           
$item = str_replace($encl,'',$item);
           
$csv_data = explode($delm,$item);
            for (
$y=0; $y<$keynumb; $y++) {
              
$out[$i][$y] = $csv_data[$y];
            }
       
$i++;
        }
    }

return
$out;
}

// --------------------------------------------------------------

?>

fuction call with 4 parameters:

(1) = the file with CSV data (url / string)
(2) = colum delimiter (e.g: ; or | or , ...)
(3) = values enclosed by (e.g: ' or " or ^ or ...)
(4) = with or without 1st row = head (true/false)

<?php

// ----- call ------
$csvdata = csv_in_array( $yourcsvfile, ";", "\"", true );
// -----------------

// ----- view ------
echo "<pre>\r\n";
print_r($csvdata);
echo
"</pre>\r\n";
// -----------------

?>

PS: also see: http://php.net/manual/de/function.fgetcsv.php to read CSV data into an array
... and other file-handling methods

^
marios88 at gmail dot com 06-Feb-2010 02:59
Quick and easy way to reverse read a file without array_reverse

<?php
$myfile
= 'test.txt';
$lines = file($myfile);   
for(
$i=count($lines);$i>0;$i--){
    echo
$lines[$i];
}
?>
d basin 14-Oct-2009 03:47
this may be obvious, but it took me a while to figure out what I was doing wrong. So I wanted to share. I have a file on my "c:\" drive. How do I file() it?

Don't forget the backslash is special and you have to "escape" the backslash i.e. "\\":

<?php

$lines
= file("C:\\Documents and Settings\\myfile.txt");

foreach(
$lines as $line)
{
    echo(
$line);
}

?>

hope this helps...
PenguinMan98 at usa dot net 21-Apr-2008 03:49
on file() and flock()

My supervisor came up with a brilliant plan to workaround the inability of the file() to work on a flock()'ed file.

We created a dummy file called lockfile.txt.  We would flock() lockfile.txt.  Once we had a lock on it, we used file() on the file we wanted to read, then altered the file and called fclose on both files.
jon+spamcheck at phpsitesolutions dot com 16-Apr-2008 01:03
A user suggested using rtrim always, due to the line ending conflict with files that have an EOL that differs from the server EOL.

Using rtrim with it's default character replacement is a bad solution though, as it removes all whitespace in addition to the '\r' and '\n' characters.

A good solution using rtrim follows:

<?php
$line
= rtrim($line, "\r\n") . PHP_EOL;
?>

This removes only EOL characters, and replaces with the server's EOL character, thus making preg_* work fine when matching the EOL ($)
vbchris at gmail dot com 16-Feb-2008 01:15
If you're getting "failed to open stream: Permission denied" when trying to use either file() or fopen() to access files on another server. Check your host doesn't have any firewall restrictions in-place which prevent outbound connections. This is the case with my host Aplus.net
Reversed: moc dot liamg at senroc dot werdna 12-Jul-2007 02:25
This note applies to PHP 5.1.6 under Windows (although may apply to other versions).

It appears that the 'FILE_IGNORE_NEW_LINES' flag doesn't remove newlines properly when reading Windows-style text files, i.e. files whose lines end in '\r\n'.

Solution: Always use 'rtrim()' in preference to 'FILE_IGNORE_NEW_LINES'.
info at carstanje dot com 28-Nov-2006 12:33
Using file() for reading large text files > 10 Mb gives problems, therefore you should use this instead. It is much slower but it works fine. $lines will return an array with all the lines.

<?php
$handle
= @fopen('yourfile...', "r");
if (
$handle) {
   while (!
feof($handle)) {
      
$lines[] = fgets($handle, 4096);
   }
  
fclose($handle);
}
?>
richardtcunningham at gmail dot com 11-Jul-2006 02:19
justin at visunet dot ie's note of 20-Mar-2003 states
"Note: Now that file() is binary safe it is 'much' slower than it used to be. If you are planning to read large files it may be worth your while using fgets() instead of file()."

I tested fgets(), file_get_contents(), and file() on PHP 4.3.2 and PHP 5 and timed each to be under a second with over 200,000 lines. I do not know if he was testing extremely long lines or what, but I could not duplicate the difference that he mentioned.
jonathan dot gotti at free dot fr 01-Feb-2006 02:52
you can use
$file = array_map('rtrim',file('myfile.txt'));
to remove annoying ending lines of the resulting array.
Nuts 18-Jan-2006 03:16
WARNING ON WINDOWS:
file() function will add "\r\n" in to the end of the row, even if you use only "\n" char to make rows in the file!

On UNIX systems there is no such problem.
dir @ badblue com 12-Sep-2003 02:48
Jeff's array2file function is a good start; here are a couple of improvements (no possibility of handle leak when fwrite fails, additional capability of both string2file and array2file; presumably faster performance through use of implode).

<?php
function String2File($sIn, $sFileOut) {
 
$rc = false;
  do {
    if (!(
$f = fopen($sFileOut, "wa+"))) {
     
$rc = 1; break;
    }
    if (!
fwrite($f, $sIn)) {
     
$rc = 2; break;
    }
   
$rc = true;
  } while (
0);
  if (
$f) {
   
fclose($f);
  }
  return (
$rc);
}

function
Array2File($aIn, $sFileOut) {
  return (
String2File(implode("\n", $aIn), $sFileOut));
}
?>

If you're generating your string text using a GET or POST from a TEXTAREA (e.g., a mini-web-text-editor), remember that strip_slashes and str_replace of "/r/n" to "/n" may be necessary as well using these functions.

HTH --dir @ badblue com
John 20-Jul-2003 04:32
after many months of confusion and frustration, i have finally figured out something that i should have noticed the first time around.

you can't file("test.txt") when that same file has been flocked. i guess i didn't have a full understanding of what i was doing when i used flock(). all i had to do was move the flock() around, and all was well.
justin at visunet dot ie 20-Mar-2003 09:36
Note: Now that file() is binary safe it is 'much' slower than it used to be. If you are planning to read large files it may be worth your while using fgets() instead of file() For example:

<?php
$fd
= fopen ("log_file.txt", "r");
while (!
feof ($fd))
{
  
$buffer = fgets($fd, 4096);
  
$lines[] = $buffer;
}
fclose ($fd);
?>

The resulting array is $lines.

I did a test on a 200,000 line file. It took seconds with fgets()  compared to minutes with file().
andrea at brancatelli dot it 16-Mar-2002 11:16
file() has a strange behaviour when reading file with both \n and \r as line delimitator (DOS files), since it will return an array with every single line but with just a \n in the end. It seems like \r just disappears.

This is happening with PHP 4.0.4 for OS/2. Don't know about the Windows version.
php@don't_spam_me 09-Feb-2002 12:56
It appears that the file() function causes file access problems for perl cgi scripts accessing the same files.  I am using Perl v5.6.0 in linux with PHP/4.0.4pl1.  After running a php app using the file() function, any perl cgi trying to access the same file randomly dies returning an internal server error: premature end of script headers.

The simple fix is to use fopen(), fgets() and fclose() instead of file().

 
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