[PHP-DOC] cvs: phpdoc /en/reference/var/functions isset.xml

[Derick Rethans]

derick          Fri May 24 14:46:16 2002 EDT

  Modified files:              
    /phpdoc/en/reference/var/functions  isset.xml 
  Log:
  - Update isset() docs (also fixes bug #17395)
  
  
Index: phpdoc/en/reference/var/functions/isset.xml
diff -u phpdoc/en/reference/var/functions/isset.xml:1.2 
phpdoc/en/reference/var/functions/isset.xml:1.3
--- phpdoc/en/reference/var/functions/isset.xml:1.2     Wed Apr 17 02:44:58 2002
+++ phpdoc/en/reference/var/functions/isset.xml Fri May 24 14:46:15 2002
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/var.xml, last change in rev 1.2 -->
   <refentry id="function.isset">
    <refnamediv>
@@ -20,31 +20,46 @@
      </para>
     </note>
     <simpara>
-     Returns &true; if <parameter>var</parameter>
-     exists; &false; otherwise.
+     Returns &true; if <parameter>var</parameter> exists; &false; otherwise.
     </simpara>
     <para>
-     If a variable has been unset with <function>unset</function>,
-     it will no longer be <function>isset</function>. <function>isset</function>
-     will return &false; if testing a variable that has been
-     set to &null;. Also note that a &null; byte (<literal>"\0"</literal>)
-     is not equivalent to the PHP &null; constant.
+     If a variable has been unset with <function>unset</function>, it will no
+     longer be <function>isset</function>. <function>isset</function> will
+     return &false; if testing a variable that has been set to &null;. Also
+     note that a &null; byte (<literal>"\0"</literal>) is not equivalent to
+     the PHP &null; constant.
      <informalexample>
       <programlisting role="php">
 <![CDATA[
-$a = "test";
-$b = "anothertest";
+<?php
+    $a = "test";
+    $b = "anothertest";
 
-echo isset ($a); // TRUE
-echo isset ($a, $b) //TRUE
+    echo isset ($a); // TRUE
+    echo isset ($a, $b); //TRUE
 
-unset ($a);
-echo isset ($a); // FALSE
-echo isset ($a, $b); //FALSE
+    unset ($a);
+    echo isset ($a); // FALSE
+    echo isset ($a, $b); //FALSE
 
 $foo = NULL;
-print isset ($foo); // FALSE
+    print isset ($foo); // FALSE
+?>
+]]>
+      </programlisting>
+     </informalexample>
+    </para>
+    <para>
+     This also work for elements in arrays:
+     <informalexample>
+      <programlisting role="php">
+<![CDATA[
+<?php
+    $a = array ('test' => 1);
 
+    echo isset ($a['test']); // TRUE
+    echo isset ($a['foo']); // FALSE
+?>
 ]]>
       </programlisting>
      </informalexample>