updating/expanding as per errata.

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@34041 c90b9560-bf6c-de11-be94-00142212c4b1

functions/array.xml

@@ -1295,6 +1295,9 @@ fruits[a] = orange
      In short, it does the opposite of <function>extract</function>.
      It returns the output array with all the variables added to it.
     </para>
+    <para>
+     Any strings that are not set will simply be skipped.
+    </para>
     <para>
      <example>
       <title><function>Compact</function> example</title>
@@ -1305,7 +1308,7 @@ $event = "SIGGRAPH";
 
 $location_vars = array ("city", "state");
 
-$result = compact ("event", $location_vars);
+$result = compact ("event", "nothing_here", $location_vars);
       </programlisting>
       <para>
        After this, <varname>$result</varname> will be <literal>array ("event"
@@ -1351,6 +1354,27 @@ $result = compact ("event", $location_vars);
       </para>
      </warning>
     </para>
+    <para>
+     <example>
+      <title><function>Count</function> example</title>
+      <programlisting role="php">
+$a[0] = 1; 
+$a[1] = 3; 
+$a[2] = 5; 
+$result = count ($a);
+//$result == 3, not 2, as there are 3 assigned elements
+
+$a[2] = 1; 
+$a[4] = ""; 
+$a[6] = 5;
+$a[8] = 7;
+$a[10] = 11;
+$a[12] = "";
+$result = count ($a);
+// $result == 4, as there are 4 assigned elements
+      </programlisting>
+     </example>
+    </para>
     <para>
      See also: <function>sizeof</function>,
      <function>isset</function>, and
@@ -1651,6 +1675,13 @@ blue, large, sphere, medium
      <varname>$wddx_size</varname>, and
      <varname>$wddx_shape</varname>.
     </para>
+    <para>
+     You must use an associative array, a numerically indexed array
+     will not produce results.
+    </para>
+    <para>
+     See also: <function>compact</function>.
+    </para>
    </refsect1>
   </refentry>
 
@@ -1678,8 +1709,9 @@ blue, large, sphere, medium
       <title><function>In_array</function> example</title>
       <programlisting role="php">
 $os = array ("Mac", "NT", "Irix", "Linux");
-if (in_array ("Irix", $os))
+if (in_array ("Irix", $os)){
     print "Got Irix";
+    }
       </programlisting>
      </example>
     </para>
@@ -1820,6 +1852,11 @@ fruits[d] = lemon
      <function>sort</function>, <function>natsort</function>, and 
      <function>rsort</function>.
     </simpara>
+    <note>
+     <para>
+      The second parameter was added in PHP 4.
+     </para>
+    </note>
    </refsect1>
   </refentry>
 
@@ -2227,12 +2264,13 @@ fruits[3] = apple
     </funcsynopsis>
     <para>
      This function shuffles (randomizes the order of the elements in)
-     an array.
+     an array. You must use <function>srand</function> to seed this
+     function.
      <example>
       <title><function>Shuffle</function> example</title>
       <programlisting role="php">
 $numbers = range (1,20);
-srand (time());
+srand ((double)microtime()*1000000);
 shuffle ($numbers);
 while (list (, $number) = each ($numbers)) {
     echo "$number ";
@@ -2341,9 +2379,14 @@ fruits[3] = orange
      See also: <function>arsort</function>,
      <function>asort</function>, <function>ksort</function>,
      <function>natsort</function>, <function>natcasesort</function>,
-     <function>rsort</function>, <function>usort</function>
-     and <function>uksort</function>.
+     <function>rsort</function>, <function>usort</function>,
+     <function>array_multisort</function>, and <function>uksort</function>.
     </para>
+    <note>
+     <para>
+      The second parameter was added in PHP 4.
+     </para>
+    </note>
    </refsect1>
   </refentry>