HTML elements

elements.php

<?php

// Block elements

$block  = 'article,aside,blockquote,body,br,button,canvas,caption,col,colgroup,dd,div,dl,dt,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,hr,li,map,object,ol,output,p,pre,progress,section,table,tbody,textarea,tfoot,th,thead,tr,ul,video';

// Inline elements
$inline = 'a,abbr,address,area,audio,b,cite,code,del,details,dfn,command,datalist,em,font,i,iframe,img,input,ins,kbd,label,legend,link,mark,meter,nav,optgroup,option,q,samp,small,small,select,source,span,strong,sub,summary,sup,tbody,td,time,var';

// Children can only be text nodes and should hold their format completely
$textonly = 'code,pre,textarea,script,style';