cvs: phpdoc /en/language types.xml

sander Tue May 7 05:57:26 2002 EDT Modified files: /phpdoc/en/language types.xml Log: Clearify the array-do's-and-don'ts - thanks to Hugh W Prior (#17065) Index: phpdoc/en/language/types.xml diff -u phpdoc/en/language/types.xml:1.76 phpdoc/en/language/types.xml:1.77 --- phpdoc/en/language/types.xml:1.76 Tue Apr 9 05:32:23 2002 +++ phpdoc/en/language/types.xml Tue May 7 05:57:26 2002 @@ -1,5 +1,5 @@ <?xml version="1.0" encoding="iso-8859-1"?> -<!-- $Revision: 1.76 $ --> +<!-- $Revision: 1.77 $ --> <chapter id="language.types"> <title>Types</title> @@ -1204,7 +1204,9 @@ <sect3 id="language.types.array.foo-bar"> <title>Why is <literal>$foo[bar]</literal> wrong?</title> <para> - You might have seen the following syntax in old scripts: + You should always use quotes around an associative array index. + For example, use $foo['bar'] and not $foo[bar]. But why is $foo[bar] + wrong? You might have seen the following syntax in old scripts: <informalexample> <programlisting role="php"> <![CDATA[ @@ -1214,8 +1216,14 @@ ]]> </programlisting> </informalexample> - This is wrong, but it works. Then, why is it wrong? The reason is - that, as stated in the <link linkend="language.types.array.syntax" + This is wrong, but it works. Then, why is it wrong? The reason is that + this code has an undefined constant (bar) rather than a string ('bar' - + notice the quotes), and PHP may in future define constants which, + unfortunately for your code, have the same name. It works, because the + undefined constant gets converted to a string of the same name. + </para> + <para> + As stated in the <link linkend="language.types.array.syntax" >syntax</link> section, there must be an expression between the square brackets ('<literal>[</literal>' and '<literal>]</literal>'). That means that you can write things like this: