PHP self-made crawler v1.0 based on simple_html_dom

My enthusiasm for web page parsing and crawler production has not diminished at all. Today I used the open source simple_html_dom.php parsing framework to make a crawler:

<?php
/*
	*.Pho spider v1.0
	*.Written by Radish.ghost 2015.1.20
*/
//error_reporting(1); //close error report
//curl model //I will realize it in later versions
include_once("simple_html_dom.php");
$html=file_get_html(&#39;http://www.baidu.com&#39;);//The url which you want dig

$tmp=array();//Save the url in the first dig
foreach($html->find('a') as $e) 
{
	$f=$e->href;
	//if($f[10]==':')continue;
	if($f[0]=='/')$f='http://www.baidu.com'.$f;//Completion the url
	if($f[4]=='s')continue;//If the url is "https://" continue (the simple_html_dom might can't prase the https:// url)  
	if(stripos($f,"baidu")==FALSE)continue;//If the url not in this website continue
    echo $f . '<br>';
	$tmp[$cun++]=$f; //Save the urls into array
}

foreach($tmp as $r) //Dig the urls in $tmp[]
{
$html2=file_get_html($r); //Redo the step
foreach($html2->find('a') as $a)
{
	$u=$a->href;
	if($u[0]=='/')$u='http://www.baidu.com'.$u;
	if($u[4]=='s')continue;
	if(stripos($u,"baidu")==FALSE)continue;
	echo $u.'<br>';
}
$html2=null;
}
?>

//In the end there will always be a Fatal error: Call to a member function find() on a non-object in D:xampphtdocshtmlindex.php on Line 21’s warning. After communicating with the seniors, I corrected a lot of small mistakes, but this still has not been solved. I hope someone can give me some advice

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simple_html_dom Download:

https://github.com/Ph0enixxx/simple_html_dom

= =I can’t use git4win on my home computer

The above introduces a v1.0 of PHP's self-made crawler based on simple_html_dom, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.