cvs: phpdoc /en/language variables.xml

philip Fri Jun 28 20:52:17 2002 EDT Modified files: /phpdoc/en/language variables.xml Log: Added <?php ?> to PHP code. Added ?> <?php to HTML code (until role="HTML" exists). Changed $Count to $count in setcookie example. Index: phpdoc/en/language/variables.xml diff -u phpdoc/en/language/variables.xml:1.50 phpdoc/en/language/variables.xml:1.51 --- phpdoc/en/language/variables.xml:1.50 Sat Jun 22 23:03:36 2002 +++ phpdoc/en/language/variables.xml Fri Jun 28 20:52:16 2002 @@ -1,5 +1,5 @@ <?xml version="1.0" encoding="iso-8859-1"?> -<!-- $Revision: 1.50 $ --> +<!-- $Revision: 1.51 $ --> <chapter id="language.variables"> <title>Variables</title> @@ -30,6 +30,7 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php $var = "Bob"; $Var = "Joe"; echo "$var, $Var"; // outputs "Bob, Joe" @@ -37,6 +38,7 @@ $4site = 'not yet'; // invalid; starts with a number $_4site = 'not yet'; // valid; starts with an underscore $täyte = 'mansikka'; // valid; 'ä' is ASCII 228. +?> ]]> </programlisting> </informalexample> @@ -285,8 +287,10 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php $a = 1; include "b.inc"; +?> ]]> </programlisting> </informalexample> @@ -301,6 +305,7 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php $a = 1; /* global scope */ function Test() @@ -309,6 +314,7 @@ } Test(); +?> ]]> </programlisting> </informalexample> @@ -329,6 +335,7 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php $a = 1; $b = 2; @@ -341,6 +348,7 @@ Sum(); echo $b; +?> ]]> </programlisting> </informalexample> @@ -362,6 +370,7 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php $a = 1; $b = 2; @@ -372,6 +381,7 @@ Sum(); echo $b; +?> ]]> </programlisting> </informalexample> @@ -393,12 +403,14 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php function Test () { $a = 0; echo $a; $a++; } +?> ]]> </programlisting> </informalexample> @@ -416,12 +428,14 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php function Test() { static $a = 0; echo $a; $a++; } +?> ]]> </programlisting> </informalexample> @@ -444,6 +458,7 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php function Test() { static $count = 0; @@ -455,54 +470,7 @@ } $count--; } -]]> - </programlisting> - </informalexample> - - <simpara> - Static initializers are evaluated when a function is defined, not - when it is executed. Thus you cannot make reference to any other - variables or initialize a static variable with the result of a - function call. The following example suggests a way around this: - </simpara> - - <informalexample> - <programlisting role="php"> -<![CDATA[ -function Test() -{ - static $magic_quotes_initialized = false; - static $magic_quotes; - if (!$magic_quotes_initialized) { - $magic_quotes = get_magic_quotes_gpc(); - $magic_quotes_initialized = true; - } - - // function body -} -]]> - </programlisting> - </informalexample> - - <simpara> - If the function you are calling has predictable return values, for - example, if it can never return <literal>null</literal>, this - can be further simplified (note the use of the identity operator - <literal>===</literal>): - </simpara> - - <informalexample> - <programlisting role="php"> -<![CDATA[ -function Test() -{ - static $magic_quotes = null; - if ($magic_quotes === null) { - $magic_quotes = get_magic_quotes_gpc(); - } - - // function body -} +?> ]]> </programlisting> </informalexample> @@ -519,6 +487,7 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php function test_global_ref() { global $obj; $obj = &new stdclass; @@ -533,6 +502,7 @@ var_dump($obj); test_global_noref(); var_dump($obj); +?> ]]> </programlisting> </informalexample> @@ -555,6 +525,7 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php function &get_instance_ref() { static $obj; @@ -586,6 +557,7 @@ echo "\n"; $obj2 = get_instance_noref(); $still_obj2 = get_instance_noref(); +?> ]]> </programlisting> </informalexample> @@ -626,7 +598,9 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php $a = "hello"; +?> ]]> </programlisting> </informalexample> @@ -641,7 +615,9 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php $$a = "world"; +?> ]]> </programlisting> </informalexample> @@ -656,7 +632,9 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php echo "$a ${$a}"; +?> ]]> </programlisting> </informalexample> @@ -668,7 +646,9 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php echo "$a $hello"; +?> ]]> </programlisting> </informalexample> @@ -726,10 +706,12 @@ <title>Simple form variable</title> <programlisting role="php"> <![CDATA[ +?> <form action="foo.php" method="post"> Name: <input type="text" name="username"><br> <input type="submit"> </form> +<?php ]]> </programlisting> </example> @@ -767,6 +749,7 @@ <title>More complex form variables</title> <programlisting role="php"> <![CDATA[ +?> <form action="array.php" method="post"> Name: <input type="text" name="personal[name]"><br> Email: <input type="text" name="personal[email]"><br> @@ -778,6 +761,7 @@ </select> <input type="submit"> </form> +<?php ]]> </programlisting> </example> @@ -798,7 +782,9 @@ <informalexample> <programlisting role="php"> <![CDATA[ +?> <input type="image" src="image.gif" name="sub"> +<?php ]]> </programlisting> </informalexample> @@ -840,7 +826,9 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php setcookie("MyCookie[]", "Testing", time()+3600); +?> ]]> </programlisting> </informalexample> @@ -856,9 +844,11 @@ <title>SetCookie Example</title> <programlisting role="php"> <![CDATA[ -$Count++; -setcookie("Count", $Count, time()+3600); -setcookie("Cart[$Count]", $item, time()+3600); +<?php +$count++; +setcookie("Count", $count, time()+3600); +setcookie("Cart[$count]", $item, time()+3600); +?> ]]> </programlisting> </example> @@ -875,7 +865,9 @@ <informalexample> <programlisting role="php"> <![CDATA[ +<?php echo $HOME; /* Shows the HOME environment variable, if set. */ +?> ]]> </programlisting> </informalexample> @@ -902,7 +894,9 @@ variable name. For the reason, look at it: <programlisting role="php"> <![CDATA[ +<?php $varname.ext; /* invalid variable name */ +?> ]]> </programlisting> Now, what the parser sees is a variable named