CVS update: php3/doc/chapters

Date: Tuesday May 11, 1999 @ 13:26 Author: cmv Update of /repository/php3/doc/chapters In directory php:/tmp/cvs-serv21105/doc/chapters Modified Files: lang-syntax.sgml Log Message: Added another section on multi-dimensional arrays. I have no way of testing whether I busted the SGML code for this (sorry). I'm pretty sure I didn't, but if someone with more knowledge than I can double check my code, that would be great. Thanks! Index: php3/doc/chapters/lang-syntax.sgml diff -u php3/doc/chapters/lang-syntax.sgml:1.34 php3/doc/chapters/lang-syntax.sgml:1.35 --- php3/doc/chapters/lang-syntax.sgml:1.34 Sun May 9 01:48:30 1999 +++ php3/doc/chapters/lang-syntax.sgml Tue May 11 13:26:38 1999 @@ -648,6 +648,9 @@ <sect1 id="variable-arrays"> <title>Array manipulation</title> + <sect2 id="variable-arrays.single-dim"> + <title>Single Dimension Arrays</title> + <para> PHP supports both scalar and associative arrays. In fact, there is no difference between the two. You can create an array using @@ -690,6 +693,84 @@ <function>prev</function> functions. Another common way to traverse an array is to use the <function>each</function> function. + + <sect2 id="variable-arrays.multi-dim"> + <title>Multi-Dimensional Arrays</title> + + <para> + Multi-dimensional arrays are actually pretty simple. For each + dimension of the array, you add another [key] value to the end: + + <informalexample> + <programlisting> +$a[1] = $f; # one dimensional examples +$a["foo"] = $f; + +$a[1][0] = $f; # two dimensional +$a["foo"][2] = $f; # (you can mix numeric and associative indices) +$a[3]["bar"] = $f; # (you can mix numeric and associative indices) + +$a["foo"][4]["bar"][0] = $f; # four dimensional! + </programlisting> + </informalexample> + + <para> + You can "fill up" multi-dimensional arrays in many ways, but + the trickiest one to grok is how to use the <function>array</function> + command for associative arrays. These two snippets of code fill up + the one-dimensional array in the same way: + + <informalexample> + <programlisting> +# Example 1: + +$a["color"] = "red"; +$a["taste"] = "sweet"; +$a["shape"] = "round"; +$a["name"] = "apple"; +$a[3] = 4; + + +# Example 2: +$a = array( + "color" => "red", + "taste" => "sweet", + "shape" => "round", + "name" => "apple", + 3 => 4 +); + </programlisting> + </informalexample> + + <para> + The <function>array</function> function can be nested for + multi-dimensional arrays: + + <informalexample> + <programlisting> +<? +$a = array( + "apple" => array( + "color" => "red", + "taste" => "sweet", + "shape" => "round" + ), + "orange" => array( + "color" => "orange", + "taste" => "sweet", + "shape" => "round" + ), + "banana" => array( + "color" => "yellow", + "taste" => "paste-y", + "shape" => "banana-shaped" + ) +); + +echo $a["apple"]["taste"]; # will output "sweet" +?> + </programlisting> + </informalexample> </chapter> -- PHP Development Mailing List http://www.php.net/ To unsubscribe send an empty message to php-dev-unsubscribe@lists.php.net For help: php-dev-help@lists.php.net