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2022-03-17 11:19:26 +01:00
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<title>defined</title>
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2022-02-23 22:54:51 +01:00
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2022-03-17 11:19:26 +01:00
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<meta name="description" content="Überprüft, ob eine Konstante definiert wurde">
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2022-02-23 22:54:51 +01:00
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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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2022-03-17 11:19:26 +01:00
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2022-03-17 11:19:26 +01:00
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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>Sonstige-Funktionen</b></a></td>
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2022-02-23 22:54:51 +01:00
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</table><table cellpadding="4" cellspacing="0" border="0" width="100%">
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<td bgcolor="#EEEEEE" class="doc" valign="bottom" width="100%">
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2022-03-17 11:19:26 +01:00
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<h2>defined</h2>
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2022-02-23 22:54:51 +01:00
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<tr>
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<td bgcolor="#EEEEEE" class="doc" valign="top" align="center">
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<img src="../../src/dokx.gif" width="30" height="20" vspace="6" border="0" alt="Informationsseite">
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</td>
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<p>
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<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="#beispiel1"><b>Beispiel1</b></a><br>
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<img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"> <a href="#ausgabe1"><b>Ausgabe1</b></a><br>
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<img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"> <a href="#beispiel2"><b>Beispiel2</b></a><br>
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<img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"> <a href="#ausgabe2"><b>Ausgabe2</b></a><br>
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</p>
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</td>
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</tr><tr><td colspan=2 bgcolor="#EEEEEE" class="doc"><a href="#bottom"><img src="../../src/down.gif" width="14" height="10" border="0" alt="nach unten"></a> </td></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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2022-03-17 11:19:26 +01:00
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<table width="100%" cellpadding=10><tr>
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<td class="xmpcode" bgcolor="#E4EEFF">int <b>defined</b>(string name)</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="79">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF" height="57">
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2022-03-17 11:19:26 +01:00
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<p>Mit defined() kann man überprüfen, ob eine Konstante (name)
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definiert wurde<br>
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und somit existiert. Im Erfolgsfall gibt die Funktion true, sonst false
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zurück.<br>
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Beachten Sie, dass bei der Definition einer Konstanten mit define() als
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Vorgabe<br>
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(d.h. wenn Sie kein drittes Argument angeben) zwischen Groß- und<br>
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Kleinschreibung unterschieden wird (siehe 2. Beispiel).</p>
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2022-02-23 22:54:51 +01:00
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<p>Siehe auch:</p>
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<ul>
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<li><a href="define.html">define()</a><br>
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</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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2022-03-17 11:19:26 +01:00
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<h2 class="Sh2"><a class="an" name="beispiel1">Beispiel1</a></h2>
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<table width="100%" cellpadding=10 height="66">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF">
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<pre><?PHP<br>define ("SELFPHP", "Version 1.0.0");<br>echo SELFPHP; <br>echo "<br>";<br>if(defined("SELFPHP"))<br> echo "Die Konstante SELFPHP wurde definiert";<br>else<br> echo "Die Konstante SELFPHP wurde nicht definiert";<br>?></pre>
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<p></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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2022-03-17 11:19:26 +01:00
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<h2 class="Sh2"><a class="an" name="ausgabe1">Ausgabe1</a></h2>
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2022-02-23 22:54:51 +01:00
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<table width="100%" cellpadding=10 height="45">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF" height="57">
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2022-03-17 11:19:26 +01:00
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<p>Version 1.0.0<br>
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Die Konstante SELFPHP wurde definiert</p>
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<p></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="beispiel2">Beispiel2</a></h2>
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<table width="100%" cellpadding=10 height="66">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF">
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<pre><?PHP<br>define ("SELFPHP", "Version 1.0.0");<br>echo SELFPHP; <br>echo "<br>";<br>if(defined("selfphp"))<br> echo "Die Konstante SELFPHP wurde definiert";<br>else<br> echo "Die Konstante SELFPHP wurde nicht definiert";<br>?></pre>
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<p></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="ausgabe2">Ausgabe2</a></h2>
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<table width="100%" cellpadding=10 height="45">
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<tr>
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<td class="xmpcode" bgcolor="#E4EEFF" height="57">
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<p>Version 1.0.0<br>
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Die Konstante SELFPHP wurde nicht definiert</p>
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<p></p>
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<p></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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2022-03-17 11:19:26 +01:00
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<td bgcolor="#EEEEEE" class="doc" align="right" width="110">weiter:<a href="die.html"><img src="../../src/next.gif" width="10" height="10" border="0" hspace="10" alt="weiter"></a></td>
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2022-02-23 22:54:51 +01:00
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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="die.html"><b>die</b></a> </td>
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</tr>
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<tr>
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2022-03-17 11:19:26 +01:00
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<td bgcolor="#EEEEEE" class="doc" align="right" width="110">zurück:<a href="define.html"><img src="../../src/prev.gif" width="10" height="10" border="0" hspace="10" alt="zurück"></a></td>
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2022-02-23 22:54:51 +01:00
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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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2022-03-17 11:19:26 +01:00
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<a href="define.html"><b>define</b></a> </td>
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2022-02-23 22:54:51 +01:00
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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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2022-03-17 11:19:26 +01:00
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<a href="index.html"><b>Sonstige-Funktionen</b></a></td>
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2022-02-23 22:54:51 +01:00
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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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