call php from ajax javascript -

i have php-based template website has been heavily modified.

i in process of adding rss feeds, of easy "interpret" , display satisfactorily 1 in caps "pre" formatting well.

i want modify content. @ mods make education , invariably able google satisfactory solutions problems come across but, despite earlier extensive programming background, without thorough grounding in javascript, ajax, php, css , html, there things frustrate hell out of me.

all want pass block of text javascript code php code, massage , result back. @ point in ajax/jscript function where...

items[i].content 

...contains block of text want massaged , have piece of code got here, think, ostensibly calls php code...

function compute() {     var params="session=123";     $.post('wxspellch.php',params,function(data){          alert(data);//for testing if data being fetched         var myobject = eval('(' + data + ')');         document.getelementbyid("result").value=myobject(addend_1,addend_2);     });  

...and, unfortunately, isn't documented don't have clue has customized. have done far enter name of php script. php script written this...

$pspell = pspell_new('en','american','','utf-8',pspell_fast); function spellcheckword($word) {     global $pspell;     $autocorrect = true;     // take string match preg_replace_callback's array     $word = $word[0];     etc...... } function spellcheck($string) {     return preg_replace_callback('/\b\w+\b/','spellcheckword',$string); } echo spellcheck("...... data   .......") 

the php tests out fine hard-coded data. need know further customizing have javascript , php in order facilitate passing , recovery of block of text.