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How to realize mining with PHP

Publish: 2021-04-29 07:16:43
1. Why not dig bitcoin BTC instead of bitcoin VTC? At present, many large-scale mines abroad have allocated one third of their computing power to dig special coins. What is the reason for this
let me analyze it:
1: bitcoin has been broken in China, and its price has dropped sharply, which is unexpected by the global mining pool
2: compared with the current mining cost of bitcoin, it makes money entirely by cheap electricity bills
3: there are only 21 million bitcoins, and most of them have been g up in the early stage, which makes it difficult to dig those bitcoins that have not been g up in the future, and there is too much competition. Many small mines are in a state of loss
and why do many well-known mines turn to TCD
first of all, bitcoin is the optimized and upgraded version of bitcoin, with a constant number of 100 million. The early mining is very good. Unlike bitcoin, which has too high cost and low cost performance ratio, it is appropriate to use bitcoin as a supplement to compare bitcoin. Bitcoin is used for large amount payment and bitcoin is used for small amount payment.
2. PHP automatic collection can be realized to a certain extent. There are some common points in the page structure of some websites, such as the title of the article content page. Many websites are marked in & lt; h1> If you can't, just collect & lt; title>, Absolutely can pick up, and then, filter out the name of the website in the title
it is relatively troublesome to collect the content of articles, but through layer by layer analysis and layer by layer stripping, we must conct a lot of website analysis, write a number of sets of general collection rules, and conct a lot of analysis when collecting the program
there are several points that can be confirmed, that is, the collection effect must not be required to achieve the effect of writing collection rules for a website, and it can not match any website, at most, it can match some websites.
3. For example, you can do the proction environment according to the situation; www.domain.com' ;;< br />
$content = file_ get_ content($url);// Grab all the contents of the web page
preg_ match( string pattern, string subject [, array matches ] );// Regular access to the content you need
warehousing ~
finished
of course, the situation is complex, such as the need to log in, collection target restrictions and so on. Let's say...
in actual use, you can directly use the Snoopy class and provide many methods for use, which is safer than building wheels yourself. Of course, you can build wheels on her basis~~~
4. < script>< br />var n=2;< br />function change(i){
n=n+i;< br />if(n< 1)n=1;< br />alert(n+". mp4");< br />}
</ script>< br />< div class=" player_sx"& gt;< br />< p style=" float:left; margin- left:5px;& " onclick=" change(-1);& "" gt;- 1</ p>< br />< p style=" float:right; margin- right:5px" onclick=" change(1);& "" gt;+ 1</ p>< br /></ div>
5.

html > < br/>< Scale > < br/> .button {
width: 70px;< Line-height: 19px;< br/> text-align: center;< br/> font-weight: bold;< br/> color: #666; < br/> text- shadow:1px 1px 1px #333; < Border-radius: 5px;< br/ > margin:0 20px 20px 0; < br/> position: relative;< br/> overflow: hidden;< br/> }
.button 1 {
width: 70px;< Line-height: 19px;< br/> text-align: center;< br/> font-weight: bold;< br/> color: #fff;< br/> text- shadow:1px 1px 1px #333; < Border-radius: 5px;< br/ > margin:0 20px 20px 0; < br/> position: relative;< br/> overflow: hidden;< br/> }
</ < br/>
< < br/>
< < br/>< hr/> < br/>< div style=" text- align:right"& < br/>< button class=" button"" gt; Investment < / button >< br/>< button class=" Button1 "" gt; Investment < / button >< br/>< / div > < br/>< hr/> < br/>< div style=" text- align:right"& < br/>< Select name=" Can not get folder: %s: %s < br/>< Option value=" Can not open message gt; Volvo < / < br/>< Option value=" Organisation gt; Saab </ < br/>< Option value=" Can not open message gt; Score </ < br/>< Option value=" "" gt; Audi </ < br/>< / Select > < br/>< / div > < br/>< / < br/>
</ < br/>< / html > < p>

6.
  • <? php

  • //背景图[UNK]原图需[UNK]持宽[UNK][UNK][UNK] 持[UNK]样[UNK]样[UNK][UNK][UNK][UNK]示例原图[UNK][UNK][UNK][UNK]蓝色背景

  • init();

  • functioninit(){

  • $old=' 001.png'

  • $new=' 002.png'

  • //创[UNK][UNK][UNK][UNK]png透[UNK]图

  • $img=imagecreatefrompng($old);

  • setpng($img,$old,$new);

  • }

  • functionsetpng($imgid,$filename,$savename){

  • $bg=' bg.png'// 背景图

  • $new=imagecreatefrompng($bg);// 创[UNK][UNK][UNK]png透[UNK]图

  • list($width,$height)=getimagesize($filename);// 获取[UNK][UNK]宽

  • $white=imagecolorallocate($imgid,0,255,0);// 36873;择[UNK][UNK]替换颜色色色

  • cleancolor($imgid,$white);

  • imagecolortransparent($imgid,$white);// 把选择的颜色替换成透明

  • imagemerge($new,$imgid,0,0,0,0,$width,$height,100);// [UNK][UNK]图片

  • imagepng($new,$savename);// [UNK]存图片

  • imagedestroy($imgid);// 销毁

  • imagedestroy($new);

  • echo'& lt; imgsrc="&# 39;.$ filename.'& "" gt;& lt; br/>> lt; imgsrc="&# 39;.$ savename.'& "" gt;&# 39;

  • }

  • functioncleancolor($imgid,$color){

  • $width=imagesx($imgid);// 获取宽

  • $height=imagesy($imgid);// 获取[UNK]

  • for($i=0;$ i<$ width;$ i++){

  • for($k=0;$ k<$ height;$ k++){

  • //[UNK]比每[UNK][UNK][UNK][UNK]素

  • $rgb=imagecolorat($imgid,$i,$k);

  • $r=($rgb>& gt; 16)& 0xff;// 取R

  • $g=($rgb>& gt; 8)& 0xff;// 取G

  • $b=$rgb& 0xff;// 取B

  • $randr=1.5;

  • $randg=1;

  • $randb=1;

  • //蓝色RGB[UNK]致[UNK]位置26367;换[UNK]绿色

  • if($r<= 60*$randr&& amp;$ g<= 200*$randg&& amp;$ b<= 255*$randb&& amp;$ b*$randb>= 100){

  • //[UNK]果[UNK][UNK][UNK] 30830;[UNK][UNK]算[UNK][UNK][UNK][UNK] 20301;置[UNK][UNK][UNK][UNK][UNK][UNK] 20889;绝[UNK][UNK] 25968;[UNK]

  • if($i>=$ width/2&& amp;$ i<=$ width/2&& amp;$ k>=$ height/2&> amp;$ k<=$ height/2){

  • }else{

  • //[UNK]变颜色p>

  • imagesetpixel($imgid,$i,$k,$color);

  • }

  • }

  • }

  • }

  • }

7.

@Function implementation is divided into two parts: presentation and message push

  1. presentation: it is relatively simple. When storing, @ xxxxx is saved directly, and when displaying, @ xxxxx is matched and replaced with the information you want

  2. message push is to let others know that you @ him. If the amount is small, you can send messages directly to the database. If the amount is large, you need message queue. You often use Beanstalk, memcacheq and so on< br />

8.
1、冒泡排序
functionbubble_sort($arr){
$n=count($arr);
for($i=0;$i<$n-1;$i){
for($j=$i1;$j<$n;$j){
if($arr[$j]<$arr[$i]){
$temp=$arr[$i];
$arr[$i]=$arr[$j];
$arr[$j]=$temp;
}
}
}
return$arr;
}
2、归并排序
functionMerge(&$arr,$left,$mid,$right){
$i=$left;
$j=$mid1;
$k=0;
$temp=array();
while($i<=$mid&&$j<=$right)
{
if($arr[$i]<=$arr[$j])
$temp[$k]=$arr[$i];
else
$temp[$k]=$arr[$j];
}
while($i<=$mid)
$temp[$k]=$arr[$i];
while($j<=$right)
$temp[$k]=$arr[$j];
for($i=$left,$j=0;$i<=$right;$i,$j)
$arr[$i]=$temp[$j];
}

functionMergeSort(&$arr,$left,$right)
{
if($left<$right)
{
$mid=floor(($left$right)/2);
MergeSort($arr,$left,$mid);
MergeSort($arr,$mid1,$right);
Merge($arr,$left,$mid,$right);
}
}
3、二分查找-递归
functionbin_search($arr,$low,$high,$value){
if($low>$high)
returnfalse;
else{
$mid=floor(($low$high)/2);
if($value==$arr[$mid])
return$mid;
elseif($value<$arr[$mid])
returnbin_search($arr,$low,$mid-1,$value);
else
returnbin_search($arr,$mid1,$high,$value);
}
}
4、二分查找-非递归
functionbin_search($arr,$low,$high,$value){
while($low<=$high){
$mid=floor(($low$high)/2);
if($value==$arr[$mid])
return$mid;
elseif($value<$arr[$mid])
$high=$mid-1;
else
$low=$mid1;
}
returnfalse;
}
5、快速排序
functionquick_sort($arr){
$n=count($arr);
if($n<=1)
return$arr;
$key=$arr[0];
$left_arr=array();
$right_arr=array();
for($i=1;$i<$n;$i){
if($arr[$i]<=$key)
$left_arr[]=$arr[$i];
else
$right_arr[]=$arr[$i];
}
$left_arr=quick_sort($left_arr);
$right_arr=quick_sort($right_arr);
returnarray_merge($left_arr,array($key),$right_arr);
}
6、选择排序
functionselect_sort($arr){
$n=count($arr);
for($i=0;$i<$n;$i){
$k=$i;
for($j=$i1;$j<$n;$j){
if($arr[$j]<$arr[$k])
$k=$j;
}
if($k!=$i){
$temp=$arr[$i];
$arr[$i]=$arr[$k];
$arr[$k]=$temp;
}
}
return$arr;
}
7、插入排序
functioninsertSort($arr){
$n=count($arr);
for($i=1;$i<$n;$i){
$tmp=$arr[$i];
$j=$i-1;
while($arr[$j]>$tmp){
$arr[$j1]=$arr[$j];
$arr[$j]=$tmp;
$j--;
if($j<0)
break;
}
}
return$arr;
}
9. Unknown_Error
10. Use trait to define a class. In the inherited class, use to define a trait class
PS: use, which can be multiple, is a simple implementation of polymorphism in PHP
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