PhpDOMDocument recursive formatting indent HTML document

: This article mainly introduces phpDOMDocument recursive formatting of indent HTML documents. if you are interested in PHP tutorials, please refer to it. Php DOMDocument recursive formatting indent HTML document

Function format (\ DOMNode $ node, $ treeIndex = 0) {// unformatted label if (in_array ($ node-> nodeName, array ("title", "p ", "span") return; if ($ node-> hasChildNodes () {$ treeIndex ++; $ tabStart = "\ r \ n ". str_repeat ("", $ treeIndex); $ tabEnd = "\ r \ n ". str_repeat ("", $ treeIndex-1); $ I = 0; while ($ childNode = $ node-> childNodes-> item ($ I ++ )) {// Remove empty text nodeif ($ childNode-> nodeType = XML_TEXT_NODE and preg_match ('# ^ \ s * $ #', $ childNode-> nodeValue )) {$ node-> removeChild ($ childNode); $ I --; continue;} $ node-> insertBefore ($ node-> ownerDocument-> createTextNode ($ tabStart ), $ childNode); $ I ++; format ($ childNode, $ treeIndex );}; $ node-> appendChild ($ node-> ownerDocument-> createTextNode ($ tabEnd); }}$ html ='
 '; $ Doc = new \ DOMDocument (); // $ doc-> formatOutput = true; // I don't know if it is my understanding, this option is incorrectly formatted. $ doc-> loadHTML ($ html); format ($ doc-> documentElement); echo $ doc-> saveHTML ();

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