[PHP-DOC] cvs: phpdoc /en/language operators.xml

[Jakub Vrana]

vrana           Tue Jun 21 20:07:30 2005 EDT

  Modified files:              
    /phpdoc/en/language operators.xml 
  Log:
  Comparison with Different Types
  
http://cvs.php.net/diff.php/phpdoc/en/language/operators.xml?r1=1.87&r2=1.88&ty=u
Index: phpdoc/en/language/operators.xml
diff -u phpdoc/en/language/operators.xml:1.87 
phpdoc/en/language/operators.xml:1.88
--- phpdoc/en/language/operators.xml:1.87       Sun Jun 19 10:55:20 2005
+++ phpdoc/en/language/operators.xml    Tue Jun 21 20:07:28 2005
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.87 $ -->
+<!-- $Revision: 1.88 $ -->
  <chapter id="language.operators">
   <title>Operators</title>
   <simpara>
@@ -549,6 +549,56 @@
     </informalexample> 
    </para>
 
+   <table>
+    <title>Comparison with Different Types</title>
+    <tgroup cols="3">
+     <thead>
+      <row>
+       <entry>Type of Operand 1</entry>
+       <entry>Type of Operand 2</entry>
+       <entry>Result</entry>
+      </row>
+     </thead>
+     <tbody>
+      <row>
+       <entry><type>null</type> or <type>string</type></entry>
+       <entry><type>string</type></entry>
+       <entry>Convert &null; to "", numerical or lexical comparison</entry>
+      </row>
+      <row>
+       <entry><type>bool</type> or <type>null</type></entry>
+       <entry>anything</entry>
+       <entry>Convert to <type>bool</type>, &false; &lt; &true;</entry>
+      </row>
+      <row>
+       <entry><type>object</type></entry>
+       <entry><type>object</type></entry>
+       <entry>Built-in classes can define its own comparison, different 
classes are uncomparable, same class - compare properties the same way as 
arrays</entry>
+      </row>
+      <row>
+       <entry><type>string</type>, <type>resource</type> or 
<type>number</type></entry>
+       <entry><type>string</type>, <type>resource</type> or 
<type>number</type></entry>
+       <entry>Translate strings and resources to numbers, usual math</entry>
+      </row>
+      <row>
+       <entry><type>array</type></entry>
+       <entry><type>array</type></entry>
+       <entry>count(op1) &lt; count(op2) =&gt; op1 &lt; op2, key from op1 not 
found in op2 =&gt; uncomparable, otherwise - compare value by value</entry>
+      </row>
+      <row>
+       <entry><type>array</type></entry>
+       <entry>anything</entry>
+       <entry><type>array</type> is greater</entry>
+      </row>
+      <row>
+       <entry><type>object</type></entry>
+       <entry>anything</entry>
+       <entry><type>object</type> is greater</entry>
+      </row>
+     </tbody>
+    </tgroup>
+   </table>
+
    <para>
     See also <function>strcasecmp</function>,
     <function>strcmp</function>,