Thư viện phpQuery kiểu khác (ok)

https://github.com/elboza/PhpQuery

C:\xampp71\htdocs\testpro\composer.json

{
  "name": "phpquery/phpquery",
  "description": "jquery for php",
  "license": "Beerware",
  "authors": [
    {
      "name": "Fernando Iazeolla",
      "email": "fernando.iazeolla@gmail.com"
    }
  ],
  "require": {},
  "autoload": {
    "psr-4": {
      "PhpQuery\\": "src/"
    }
  }
}

C:\xampp71\htdocs\testpro\test\sample.html

<!DOCTYPE html>
<html>
<head>
  <title>sample html</title>
</head>
<body>
  <p id="myid">Hello</p>
  <div class="c1"> hello again</div>
  <div class="c2"> hi</div>
  <div class="c1 c2 c3">hi hi</div>
  <div class="dav-k">foo</div>
  <div class="Opin">
    <p>bar</p>
  </div>
  <ul>
    <li> one</li>
    <li> two</li>
    <li> three</li>
  </ul>
</body>
</html>

C:\xampp71\htdocs\testpro\test\pqtest.php

<?php
require_once __DIR__ . '/../vendor/autoload.php';
use PhpQuery\PhpQuery;
echo "hi<br>";
$page=file_get_contents('sample.html');
$pq=new PhpQuery;
$pq->load_str($page);
echo "<br><br>";
//return a list of 2 components
var_dump($pq->query('.c1'));
echo "<br><br>";
//return the first element
var_dump($pq->query('.c1')[0]);
echo "<br><br>";
//return a list of 1 element
var_dump($pq->query('.c1.c3'));
echo "<br><br>";
//return the first element
var_dump($pq->query('.c1.c3')[0]);
echo "<br><br>";
//return a ist of 3 elements element
var_dump($pq->query('ul li'));
echo "<br><br>";
//return a ist of 1 elements element
var_dump($pq->query('ul'));
echo "<br><br>";
//return a ist of 3 elements element
//relative call
//first lookup for ul
//and the from that ul seeks li
$x=$pq->query('ul');
var_dump($x=$pq->query('li',$x[0]));
echo "<br><br>";
//return a ist of 1 elements element
var_dump($pq->query('#myid'));
echo "<br><br>";
//return the first element
var_dump($pq->query('#myid')[0]);
echo "<br>~~textContent ~~> ";
var_dump($pq->query('#myid')[0]->textContent);
echo "<br><br>";
//print the transormation fron jquery syntax
//to xpath syntax
echo $pq->j_to_x('.c1.c3');
echo $pq->j_to_x('#myid');
echo "<br><br>";
//return a list of 1 element
//from xpath syntax
var_dump($pq->xpath('//*[@id="myid"]'));
echo "<br><br>";
//return the first element
//from xpath syntax
var_dump($pq->xpath('//*[@id="myid"]')[0]);
echo '<br><br>';
var_dump($pq->innerHTML($pq->query('.Opin')[0]));
echo '<br><br>';
var_dump($pq->outerHTML($pq->query('.dav-k')[0]));

C:\xampp71\htdocs\testpro\src\PhpQuery.php

<?php
namespace PhpQuery;

class PhpQuery{
	private $doc,$xpath;
	function __construct(){

	}
	private function preprocess($str){
		$list=explode(' ',$str);
		return $list;
	}
	private function get_tag($str){
		if(preg_match('/^\w+/',$str,$matches)){
			return $matches[0];
		}else{
			return '*';
		}
	}
	private function get_id($str){
		if(preg_match('/#\w+/',$str,$matches)){
			return substr($matches[0],1);
		}
		return '';
	}
	private function get_classes($str){
		if(preg_match_all('/(?<=\.)[\w-]+/',$str,$matches)){
			return $matches[0];
		}
		return array();
	}
	private function get_autotags($str){
		if(preg_match_all('/(?<=\[)\w+=?[\"\']?\w+[\"\']?(?=\])/',$str,$matches)){
			return $matches[0];
		}
		return array();
	}
	private function parse_item($str){
		$item=array();
		$item['tag']=$this->get_tag($str);
		$item['id']=$this->get_id($str);
		$item['classes']=$this->get_classes($str);
		$item['autotags']=$this->get_autotags($str);
		return $item;
	}
	private function autotags_to_xpath($autotags){
		$str='';
		foreach($autotags as $a){
			$str .= "[@{$a}]";
		}
		return $str;
	}
	private function class_to_xpath($class){
		$arr=array();
		if(empty($class)) return '';
		foreach($class as $a){
			array_push($arr,"contains(concat(' ', normalize-space(@class), ' '), ' ${a} ')");
		}
		return "[" . implode(" and ",$arr) . "]";
	}
	private function id_to_xpath($id){
		if($id==null) return '';
		if($id=='') return '';
		return "[@id=\"{$id}\"]";
	}
	public function to_xpath($item){
		$str="{$item['tag']}";
		$str .= $this->id_to_xpath($item['id']);
		$str .= $this->autotags_to_xpath($item['autotags']);
		$str .= $this->class_to_xpath($item['classes']);
		return $str;
	}
	public function load_str($str){
		$this->doc = new \DOMDocument();
		$internalErrors = libxml_use_internal_errors(true);
		$this->doc->loadHTML($str);
		libxml_use_internal_errors($internalErrors);
		$this->xpath = new \DOMXPath($this->doc);
		//libxml_use_internal_errors($internalErrors);
		//echo $doc->saveHTML();
	}
	private function free(){
		$xpath=null;
		$doc=null;
	}
	public function j_to_x($str,$b_rel=false){
		$arr=array();
		foreach($this->preprocess($str) as $a){
			array_push($arr,$this->to_xpath($this->parse_item($a)));
		}
		if($b_rel==false) $rel_str='//'; else $rel_str='';
		return $rel_str . implode("/",$arr);
	}
	public function query($str,$relative_node=null){
		if($relative_node!=null) $b_rel=true; else $b_rel=false;
		if($b_rel) return $this->xpath->query($this->j_to_x($str,$b_rel),$relative_node);
		return $this->xpath->query($this->j_to_x($str));
	}
	public function xpath($str,$relative_node=null){
		return $this->xpath->query($str,$relative_node);
	}
	public function innerHTML($element)
	{
		if(!$element) return'';
		$innerHTML = "";
		$children  = $element->childNodes;

		foreach ($children as $child)
		{
			$innerHTML .= $element->ownerDocument->saveHTML($child);
		}

		return $innerHTML;
	}
	public function outerHTML($element)
	{
		if(!$element) return'';
		return $element->ownerDocument->saveHTML($element);
	}
}

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