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HTML
288 lines
11 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<html>
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<head>
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<title>chmod</title>
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<link rel="stylesheet" type="text/css" href="../../src/self.css">
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<meta name="description" content="Ändert die Zugriffsrechte einer Datei">
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<meta name="keywords" content="SELFPHP, PHP, Dateisystem-Funktionen, chmod">
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<meta name="author" content="Damir Enseleit, mail@selfphp.info">
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<meta name="DC.Contributer" content="Matthias Hupp, m.hupp@selfphp3.de">
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<meta name="DC.Publisher" content="Damir Enseleit, mail@selfphp.info">
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<meta name="DC.Date" content="2001-08-13T12:18+01:00">
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<meta name="DC.Identifier" content="http://www.selfphp3.de/funktionsreferenz/dateisystem_funktionen/chmod.html">
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<meta name="DC.Language" content="de">
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<meta name="DC.Rights" content="../../editorial/index.html">
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<meta name="SELF.Firstdate" content="2001-08-13T12:18+01:00">
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<meta name="SELF.Version" content="1">
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<meta name="SELF.Pagetype" content="Information">
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<meta name="SELF.Path" content="SELFPHP == ../../index.php // Funktionsreferenz == ../index.php // Dateisystem-Funktionen == index.html">
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</head>
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<body bgcolor="#FFFFFF" text="#000000" link="#AA5522" vlink="#772200" alink="#000000">
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<table cellpadding="4" cellspacing="0" border="0" width="100%">
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<tr>
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<td bgcolor="#FFEEDD" class="nav"><a class="an" name="top"><img src="../../src/refkap.gif" width="16" height="13" border="0" alt="Teil von"></a> <a href="../../index.html"><b>SELFPHP</b></a>/<a href="../../navigation/index.html">Navigationshilfen</a> <img src="../../src/refkap.gif" width="16" height="13" border="0" alt="Teil von"> <a href="../index.html"><b>Funktionsreferenz</b></a> <img src="../../src/refkap.gif" width="16" height="13" border="0" alt="Teil von"> <a href="index.html"><b>Dateisystem-Funktionen</b></a></td>
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</tr>
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</table>
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<table cellpadding="4" cellspacing="0" border="0" width="100%">
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<tr>
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<td bgcolor="#EEEEEE" class="doc" width="110"><img src="../../src/logo.gif" width="106" height="109" border="0" alt="SEL.html"></td>
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<td bgcolor="#EEEEEE" class="doc" valign="bottom" width="100%">
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<h2>chmod</h2></td>
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</tr>
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<tr>
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<td bgcolor="#EEEEEE" class="doc" valign="top" align="center"> <img src="../../src/dokx.gif" width="30" height="20" vspace="6" border="0" alt="Informationsseite">
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</td>
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<td bgcolor="#FFFFFF" valign="top" nowrap colspan="2">
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<p> <img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"> <a href="#befehl"><b>Befehl</b></a><br>
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<img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"> <a href="#version"><b>Version</b></a><br>
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<img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"> <a href="#beschreibung"><b>Beschreibung</b></a><br>
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<img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"> <a href="#beispiel"><b>Beispiel</b></a><br>
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<img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"> <a href="#ausgabe"><b>Ausgabe</b></a><br>
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</p>
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</td>
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</tr>
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<tr>
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<td colspan=3 bgcolor="#EEEEEE" class="doc"><a href="#bottom"><img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"></a> </td>
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</tr>
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</table>
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<h2 class="Sh2"><a class="an" name="befehl">Befehl</a></h2>
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<table width="100%" cellpadding=10><tr>
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<td class="xmpcode" bgcolor="#E4EEFF">int <b>chmod</b>(string filename, int
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mode)</td>
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</tr></table>
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<p> </p>
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<table bgcolor="#EEEEEE" class="doc" width="100%"><tr><td>
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<a href="#top"><img src="../../src/up.gif" width="14" height="10" border="0" alt="nach oben"></a><a href="#bottom"><img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"></a> 
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</td></tr></table>
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<h2 class="Sh2"><a class="an" name="version">Version</a></h2>
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<table width="100%" cellpadding=10 height="32">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF" height="20">
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<p> PHP 3, PHP 4 >= 4.0b1</p>
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</td>
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</tr></table>
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<p> </p>
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<table bgcolor="#EEEEEE" class="doc" width="100%"><tr><td>
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<a href="#top"><img src="../../src/up.gif" width="14" height="10" border="0" alt="nach oben"></a><a href="#bottom"><img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"></a> 
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</td></tr></table>
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<h2 class="Sh2"><a class="an" name="beschreibung">Beschreibung</a></h2>
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<table width="100%" cellpadding=10 height="103">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF" height="57">
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<p>Mit chmod() kann man die Zugriffsrechte auf eine Datei ändern. Dabei
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wird der<br>
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neue Zugriffswert (mode) der Datei (filename) als Oktalzahl angegeben.<br>
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Diese Funktion ist sehr nützlich, um nur bestimmte Rechte für
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eine Datei zu<br>
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vergeben. Wenn Sie z.B. Statistiken, welche Sie über die Index-Datei
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sammeln,<br>
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in eine TXT-Datei schreiben und nicht wollen, dass diese direkt aus dem
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Internet<br>
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aufgerufen werden kann, so können Sie diese Datei mit speziellen
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Rechten (z.B.<br>
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0600) ausstatten. Nun kann nur noch ein Skript von Ihrem Server auf diese
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Datei<br>
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zugreifen.</p>
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<p><b>Wichtig:</b> Die Funktion chmod() wird auf dem Betriebssystem Windows
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nichts<br>
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bewirken.</p>
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<p>Bei der Rechtevergabe kann man für den Eigentümer/Owner, Gruppe/Group
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und<br>
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den Rest der Welt/Public verschiedene Zugriffsrechte vergeben.<br>
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</p>
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<p>Werte für mode:</p>
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<ul>
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<li>Lesen/Read = r = 4</li>
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<li>Schreiben/Write = w = 2</li>
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<li>Ausführen/Execute = x = 1</li>
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</ul>
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<table border=0>
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<tr>
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<td colspan="26">Rechenbeispiel:</td>
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</tr>
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<tr>
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<td>drwxr-xrw-</td>
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<td>r</td>
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<td>+</td>
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<td>w</td>
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<td>+</td>
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<td colspan="2">x</td>
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<td> </td>
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<td>r</td>
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<td>+</td>
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<td>-</td>
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<td>+</td>
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<td colspan="2">x</td>
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<td> </td>
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<td>r</td>
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<td>+</td>
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<td>w</td>
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<td>+</td>
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<td colspan="2">-</td>
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<td> </td>
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<td>0756</td>
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</tr>
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<tr>
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<td>das entspricht </td>
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<td>4</td>
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<td>+</td>
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<td>2</td>
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<td>+</td>
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<td>1</td>
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<td>=7</td>
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<td> </td>
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<td>4</td>
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<td>+</td>
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<td>0</td>
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<td>+</td>
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<td>1</td>
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<td>=5</td>
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<td> </td>
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<td>4</td>
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<td>+</td>
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<td>2</td>
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<td>+</td>
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<td>0</td>
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<td>=6</td>
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<td> </td>
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<td>0756</td>
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</tr>
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</table>
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<p> </p>
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<table border=0>
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<tr>
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<td colspan="5">Beispiele</td>
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</tr>
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<tr>
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<td> </td>
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<td>User </td>
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<td>Group </td>
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<td>World </td>
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<td>Oktal</td>
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</tr>
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<tr>
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<td>drwxrwxrwx </td>
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<td>rwx</td>
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<td>rwx</td>
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<td>rwx</td>
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<td>0777</td>
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</tr>
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<tr>
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<td>drwxr-xr-x</td>
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<td>rwx</td>
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<td>r-x</td>
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<td>r-x</td>
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<td>0755</td>
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</tr>
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<tr>
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<td>drwx------</td>
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<td>rwx</td>
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<td>---</td>
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<td>---</td>
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<td>0700</td>
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</tr>
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<tr>
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<td>drwxr-x---</td>
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<td>rwx </td>
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<td>r-x</td>
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<td>---</td>
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<td>0750</td>
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</tr>
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<tr>
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<td>drwxr-xr--</td>
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<td>rwx</td>
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<td>r-x</td>
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<td>r--</td>
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<td>0754</td>
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</tr>
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</table>
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<p>Siehe auch:</p>
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<ul>
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<li><a href="chown.html">chown()</a></li>
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<li><a href="chgrp.html">chgrp</a></li>
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</ul>
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</td>
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</tr></table>
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<p> </p>
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<table bgcolor="#EEEEEE" class="doc" width="100%"><tr><td>
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<a href="#top"><img src="../../src/up.gif" width="14" height="10" border="0" alt="nach oben"></a><a href="#bottom"><img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"></a> 
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</td></tr></table>
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<h2 class="Sh2"><a class="an" name="beispiel">Beispiel</a></h2>
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<table width="100%" cellpadding=10 height="62">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF">
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<pre><?PHP<br>$datei = "zahl.txt";<br>clearstatcache(); <br>$chmod = decoct(fileperms($datei));<br>echo "CHMOD vorher: " . $chmod;<br>chmod ($datei, 0777);<br>clearstatcache(); <br>echo "<br>";<br>$chmod = decoct(fileperms($datei));<br>echo "CHMOD nachher: " . $chmod;<br>?></pre>
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</td>
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</tr></table>
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<p> </p>
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<table bgcolor="#EEEEEE" class="doc" width="100%"><tr><td>
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<a href="#top"><img src="../../src/up.gif" width="14" height="10" border="0" alt="nach oben"></a><a href="#bottom"><img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"></a> 
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</td></tr></table>
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<h2 class="Sh2"><a class="an" name="ausgabe">Ausgabe</a></h2>
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<table width="100%" cellpadding=10 height="30">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF" height="57">
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<p>CHMOD vorher: 100600<br>
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CHMOD nachher: 100777</p>
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</td>
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</tr></table>
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<p> </p>
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<table cellpadding="4" cellspacing="0" border="0" width="100%">
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<tr><td colspan=2 bgcolor="#EEEEEE" class="doc">
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<a href="#top"><img src="../../src/up.gif" width="14" height="10" border="0" alt="nach oben"></a>
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</td></tr>
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<tr>
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<td bgcolor="#EEEEEE" class="doc" align="right" width="110">weiter:<a href="chown.html"><img src="../../src/next.gif" width="10" height="10" border="0" hspace="10" alt="weiter"></a></td>
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<td bgcolor="#FFFFFF"><img src="../../src/dok.gif" width="15" height="10" border="0" alt="Seite">
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<a href="chown.html"><b>chown</b></a> </td>
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</tr>
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<tr>
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<td bgcolor="#EEEEEE" class="doc" align="right" width="110">zurück:<a href="chgrp.html"><img src="../../src/prev.gif" width="10" height="10" border="0" hspace="10" alt="zurück"></a></td>
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<td bgcolor="#FFFFFF" width="100%"><img src="../../src/dok.gif" width="15" height="10" border="0" alt="Seite">
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<a href="chgrp.html"><b>chgrp</b></a> </td>
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</tr>
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<tr><td colspan=2 bgcolor="#EEEEEE" class="doc"> </td></tr>
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</table><table cellpadding="4" cellspacing="0" border="0" width="100%">
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<tr>
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<td bgcolor="#FFEEDD" class="nav"><a class="an" name="bottom"><img src="../../src/refkap.gif" width="16" height="13" border="0" alt="Teil von"></a>
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<a href="../../index.html"><b>SELFPHP</b></a>/<a href="../../navigation/index.html">Navigationshilfen</a> <img src="../../src/refkap.gif" width="16" height="13" border="0" alt="Teil von">
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<a href="../index.html"><b>Funktionsreferenz</b></a> <img src="../../src/refkap.gif" width="16" height="13" border="0" alt="Teil von">
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<a href="index.html"><b>Dateisystem-Funktionen</b></a></td>
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</tr>
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</table>
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<p><a class="an" name="bottom">© 2001, 2002, 2003</A> <img src="../../src/mail.gif" width="15" height="10" border="0" alt="E-Mail"> <a href="mailto:mail@selfphp.info">Damir Enseleit, mail@selfphp.info</a></p>
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</body>
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</html>
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