Processing XML with PHP - Conclusion

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The contents of your callback functions are obviously dependant upon the XML document your script will process and how you want to display its information. Let's assume the following sample XML document:

<list>   <languages type="interpreted">     <name>PHP</name>     <name>Python</name>     <name>Ruby</name>   </languages>   <languages type="compiled">     <name>C</name>     <name>Fortan</name>     <name>Pascal</name>   </languages> </list>

We can write the functions of our framework to manipulate the contents of the sample XML file.

<?php $compiled_langs = array(); $interprt_langs = array(); $flag = ""; $count = 0; function opening_element($parser, $element, $attributes) {   /* opening XML element callback function */   global $flag;   if ($element == "languages")     $flag = $attributes["type"]; } function closing_element($parser, $element) {   /* closing XML element callback function */   global $flag;   if ($element == "languages")     $flag = ""; } function character_data($parser, $data) {   /* callback function for character data */   global $flag;   if ($flag == "compiled") {     global $compiled_langs;     $compiled_langs[] = $data;   }   if ($flag == "interpreted") {     global $interprt_langs;     $interprt_langs[] = $data;   } } $parser = xml_parser_create(); xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, false); xml_set_element_handler($parser, "opening_element", "closing_element"); xml_set_character_data_handler($parser, "character_data"); $document = file("sample.xml"); foreach ($document as $line) {   xml_parse($parser, $line); } xml_parser_free($parser); echo "The following compiled languages were found...&lt;br /&gt;"; foreach ($compiled_langs as $name) {   $count++;   echo "$count. $name &lt;br /&gt;"; } echo "&lt;br /&gt;"; $count = 0; echo "The following interpreted languages were found...&lt;br /&gt;"; foreach ($interprt_langs as $name) {   $count++;   echo "$count. $name &lt;br /&gt;"; } ?>

When run, the script produces the following output:

The following compiled languages were found...   1. C   2. Fortran   3. Pascal The following interpreted languages were found...   1. PHP   2. Ruby   3. Python

About the Author

Timothy Boronczyk lives in Syracuse, NY, where he works as an E-Services Coordinator for a local credit union. He has a background in elementary education, over 5 years experience in web design and has written tutorials on web design, PHP, Ruby, XML and various other topics. His hobbies include photography and composing music.

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Comments On: Processing XML with PHP

· Is there any way to use this to parse external files, ie. RSS feeds from another...    · This is output what i am getting.The following compiled languages were...    · <?php$compiled_langs = array();$interprt_langs = array();$flag =...    · The program, as presented, does not work as presented. The problem, however, is not...   >>> Post your comment now!