PHP :: Bug #16225 :: fwrite/fputs writes everthing twice with 'a' mode

Bug #16225	fwrite/fputs writes everthing twice with 'a' mode
Submitted:	2002-03-22 16:49 UTC	Modified:	2002-03-22 17:10 UTC
From:	speltzer at unisolutions dot de	Assigned:
Status:	Not a bug	Package:	Filesystem function related
PHP Version:	4.1.2	OS:	SuSe Linux 7.3
Private report:	No	CVE-ID:	None

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From:	speltzer at unisolutions dot de
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[2002-03-22 16:49 UTC] speltzer at unisolutions dot de

if fopen opened a file with a or a++ fwrite writes everthing twice into the output file.

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[2002-03-22 17:10 UTC] sander@php.net

Not enough information was provided for us to be able
to handle this bug. Please re-read the instructions at
http://bugs.php.net/how-to-report.php

If you can provide more information, feel free to add it
to this bug and change the status back to "Open".

[2003-01-28 03:02 UTC] hematec at gmx dot de

I had the same problem under win xp and apache 2.0.44 with php4:

fwrite writes sometimes strings twice in the file:

my sourcecode is:

$artikel_nr;
$kundennummer;
$artikel_anzahl;
$bemerkung;
if (($artikel_nr!='') and ($artikel_anzahl>0))
{
//?berpr?fen ob heutiger wk existiert, sonst anlegen!!
	$datum=date('d-m-y');
	$datei_name=$datum.".wk";
	$datei_pfad="wk/".$kundennummer."/";
	$datei=$datei_pfad.$datei_name;
//Datei ?ffnen
/*$tmp_string='';
if(file_exists($datei)){
	$file_handler=fopen($datei, 'r');
	do {
	$tmp_string=$tmp_string.fgets($file_handler, 500)."\n";
	} while (!feof($file_handler));
	fclose($file_handler);
	}*/

$file_handler=fopen($datei,a);
//artikel-string erzeugen und in datei schreiben
	$artikel_string=$artikel_nr."|".$artikel_anzahl."|".$bemerkung."\n";
//in Datei schreiben	
	fwrite($file_handler,$artikel_string);
//datei schlie?en
	fclose($file_handler);
}
?>
<html>

<head>
<script language=JavaScript>
		

	function neu_sortieren(kriterium){
		parent.ergebniss.document.search_parameter.sortierung.value=''+kriterium;
		parent.ergebniss.document.search_parameter.submit();
		}


	function artikel_in_korb(){
		var fehler=0;
		//artikeldaten holen
		var artikel_nr='';
		document.bestellen.artikel_nr.value=top.details.artikel_details.artikelnr.value;
		var kundennummer='';
		document.bestellen.kundennummer.value=top.oben.kundendaten.kundennummer.value;
		var session_nr='';
		document.bestellen.session_nr.value=top.oben.kundendaten.session_nr.value;
		
		//bestellmenge ?berpr?fen
		var tmp=document.bestellen.artikel_anzahl.value;
		tmp=parseInt(tmp);
		if (isNaN(tmp)){
			fehler=2;alert('fehler 2');}
		else{
		document.bestellen.artikel_anzahl.value=tmp;}		

		//artikeldaten ?berpr?fen
		if (document.bestellen.artikel_nr.value==''){fehler=1;}
		
		if (fehler==0){
		document.bestellen.action="bestellen.php"
		document.bestellen.submit();
		}
		else
		{document.bestellen.artikel_nr.value='';
		document.bestellen.artikel_anzahl.value=0;
		if (fehler==1){
			alert('Sie haben kein Artikel markiert!');
			}
		if (fehler==2){
			alert('Die Bestellmenge ist nicht ganzzahlig!');
			}
		}
	}

</script>
<title>markierte Artikel in Warenkorb legen</title>
</head>

<body bgcolor="#6666FF">

<form name='bestellen' method='post'>
<div align="center">
  <center>
<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="760" id="AutoNumber1">
    <tr>
      <td width="55">&nbsp;</td>
      <td width="75">
      <p align="right"><font face="Arial" size="1" color="#FFFFFF">Anzahl</font></td>
      <td width="50">
      <input type="text" size="4" name="artikel_anzahl" value="1">&nbsp; </td>
      <td width="60">
      <font size="1" face="Arial" color="#FFFFFF">Bemerkung</font></td>
      <td width="200">
      <input type="text" name="bemerkung" size="30"></td>
      <td width="195">
      &nbsp;<input type="submit" value="Artikel in Korb" onclick='javascript:artikel_in_korb();'></td>
      <td width="125">&nbsp;</td>
    </tr>
  </table>


  </center>
</div>
<input type=hidden name=artikel_nr>
<input type=hidden name=kundennummer>
<input type=hidden name=session_nr>
</form><!-- bestellen -->
  <div align="center">
    <center>
  <table border="1" cellpadding="0" cellspacing="0" style="border-collapse: collapse; border-right-width:0; border-top-width:0; border-bottom-width:0" bordercolor="#000000" width="772" id="AutoNumber2" bgcolor="#9999FF">
    <tr>
      <td width="70" align="center" style="border-top-color: #000000; border-top-width: 1; border-bottom-color: #000000; border-bottom-width: 1">
      <b><a href="JavaScript:neu_sortieren('artikelnr');"><font size="2" face="Arial" color="#ffffff">Artikelnr.</font></a></b></td>
      <td width="90" align="center" style="border-top-color: #000000; border-top-width: 1; border-bottom-color: #000000; border-bottom-width: 1">
      <b><a href="JavaScript:neu_sortieren('herstnr');"><font size="2" face="Arial" color="#ffffff">Herstellernr.</font></b></a></td>
      <td width="410" align="center" style="border-top-color: #000000; border-top-width: 1; border-bottom-color: #000000; border-bottom-width: 1">
      <b><a href="JavaScript:neu_sortieren('bezeichnung');"><font size="2" face="Arial" color="#ffffff">Bezeichnung</font></b></a></td>
      <td width="70" align="center" style="border-top-color: #000000; border-top-width: 1; border-bottom-color: #000000; border-bottom-width: 1">
      <b><a href="JavaScript:neu_sortieren('preis');"><font size="2" face="Arial" color="#ffffff">Preis</font></b></a></td>
      <td width="110" align="center" style="border-top-color: #000000; border-top-width: 1; border-bottom-color: #000000; border-bottom-width: 1">&nbsp;</td>
      <td width="16" align="center" bgcolor="#6666FF" style="border-left-style: solid; border-left-width: 1; border-right-style: none; border-right-width: medium; border-top-style: none; border-top-width: medium; border-bottom-style: none; border-bottom-width: medium">&nbsp;</td>
    </tr>
  </table>


    </center>
</div>


</body>
</html>

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