PHP脚本性能问题
[英]PHP script performance issue
问题描述
There seems to be a performance issue with the script as it is really slow. 
脚本似乎存在性能问题，因为它非常慢。 I was wondering what I could do to speed this up. 我想知道我能做些什么才能加快速度。 If you have any ideas, please let me know. 如果您有任何想法，请告诉我。 I can't seem to figure it out. 我似乎无法弄明白。
Below is the code: 以下是代码：
<?php
include_once("connect.php.inc");
class HtmlEnc{
static function uniord($c) {
$ud = 0;
if (ord($c{0}) >= 0 && ord($c{0}) <= 127) $ud = ord($c{0});
if (ord($c{0}) >= 192 && ord($c{0}) <= 223) $ud = (ord($c{0})-192)*64 + (ord($c{1})-128);
if (ord($c{0}) >= 224 && ord($c{0}) <= 239) $ud = (ord($c{0})-224)*4096 + (ord($c{1})-128)*64 + (ord($c{2})-128);
if (ord($c{0}) >= 240 && ord($c{0}) <= 247) $ud = (ord($c{0})-240)*262144 + (ord($c{1})-128)*4096 + (ord($c{2})-128)*64 + (ord($c{3})-128);
if (ord($c{0}) >= 248 && ord($c{0}) <= 251) $ud = (ord($c{0})-248)*16777216 + (ord($c{1})-128)*262144 + (ord($c{2})-128)*4096 + (ord($c{3})-128)*64 + (ord($c{4})-128);
if (ord($c{0}) >= 252 && ord($c{0}) <= 253) $ud = (ord($c{0})-252)*1073741824 + (ord($c{1})-128)*16777216 + (ord($c{2})-128)*262144 + (ord($c{3})-128)*4096 + (ord($c{4})-128)*64 + (ord($c{5})-128);
if (ord($c{0}) >= 254 && ord($c{0}) <= 255) $ud = false; // error
return $ud;
}
static function toHtml($str){
$html_str = "";
while (strlen($str) > 0) {
preg_match("/^(.)(.*)$/u", $str, $match);
$test = utf8_decode($match[1]);
if ($test != "?") {
$html_str .= htmlentities(htmlentities($test));
} else if (strlen($match[1]) > 1) {
$html_str .= "&#".self::uniord($match[1]).";";
} else $html_str .= htmlentities(htmlentities($match[1]));
$str = $match[2];
}
return $html_str;
}
}
/*
List of mail servers
*/
function alreadyDone($domain){
$domain = strtolower($domain);
$qry = "SELECT * FROM emdb WHERE domain ='" . $domain . "'";
$result = mysql_query($qry);
return (mysql_num_rows($result)!=0);
}
$template_fn = $_REQUEST['template'];
//"mail_template.html";
$keywords = HtmlEnc::toHtml($_REQUEST['Keywords']);
$keywords = str_replace("&","&",$keywords);
$domain = $_REQUEST['Domain'];
$rank = $_REQUEST['Rank'];
$to = $_REQUEST['Email'];
$adminEmail = "test@example.com";
if (!alreadyDone($domain)) {
if ($to=="") {
$to = "info@" . $domain;
}
function int_divide($x, $y) {
if ($x == 0) return 0;
if ($y == 0) return FALSE;
return ($x - ($x % $y)) / $y;
}
$page = int_divide($rank,10) + 1;
if ($template_fn == "mail_template_nick.html" || $template_fn == "mail_template_chet.html" || "mail_template_salesperson.php")
$subject = $domain." is on Page ".$page." of Google - Want to be #1?";
elseif ($template_fn == "seo_template.html")
$subject = "Outsource your SEO - Lowest rates guaranteed!";
elseif ($template_fn == "adwords_template.html")
$subject = $domain . " - Save your money on Google Adwords";
else $subject = $domain . " is ranked " . $rank . " on Google - Be 1st!";
$message = file_get_contents($template_fn);
/*$message = "<body>
<p>Hi There,</p>
<p>How's your week been so far?</p>
<p>When I Googled "{KEYWORD}", I found {WEBSITE} on page {PAGE}, not on page 1. This means consumers will find your competitors before they find you!</p>
<p>93% of all people, never go past the 1st page of Google, so at this very moment you're losing sales & leads to a competitor. </p>
<p>If you agree your Google exposure needs drastic improvement, please call me for a chat, I'm sure I can give some good, free advice. </p>
<p> </p>
<p><strong>Best Regards,</strong></p>
<p><strong>Kayne Chong </strong><strong>- Business Development Director</strong></p>
<p><strong>Tel:</strong> | <strong>Fax: </strong><br />
<strong>Office:</strong> <br />
<strong>Web:</strong> <a href='http://www.seoagency.com.sg/' target='_blank'><em>www.seoagency.com.sg</em></a><br />
<strong><em>Web marketing that brings BUSINESS to you!</em></strong></p>
</body>";*/
$message = str_replace("{WEBSITE}", $domain , $message);
$message = str_replace("{PAGE}", $page , $message);
//$message = str_replace("{RANK}", $rank , $message);
$message = str_replace("{KEYWORD}", $keywords , $message);
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
// Additional headers
/*$headers .= 'Bcc: ' . $adminEmail . "\r\n";
if ($template_fn == "mail_template_salesperson.php")
{ $headers .= 'From: Kayne - Web Marketing Experts <test@example.com>' . "\r\n";
$headers .= 'Reply-To: test@example.com' . "\r\n";}
elseif ($template_fn == "mail_template_chet.html")
{ $headers .= 'From: Chester - Web Marketing Experts <test@example.com>' . "\r\n";
$headers .= 'Reply-To: test@example.com' . "\r\n";}*/
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
$headers .= 'Bcc: ' . $adminEmail . "\r\n";
$headers .= 'From: Info - Web Marketing Experts <test@example.com>' . "\r\n";
$headers .= 'Reply-To: test@example.com' . "\r\n";
if (mail($to, $subject, $message, $headers)) {
echo "Mail successfully sent to $to and $adminEmail";
} else echo "Mail sending failed!";
$qry = "INSERT INTO emdb (domain, keywords, rank, last, count) VALUES ('$domain','$keywords','$rank',CURDATE(), '1')";
mysql_query($qry) or die(mysql_error());
echo "<BR />";
echo "DB updated";
} else {
echo "Domain name $domain has already been processed";
}
?>
Thank you. 谢谢。 Jae 宰
2 个解决方案
解决方案1
2 已采纳 2011-08-01 09:24:09
- Replace every string concatenation with the "." 用“。”替换每个字符串连接。 operator with an array push, for example array [ ] = "foo" and then return a string concatenation implode ( array ); 具有数组推送的运算符，例如array [] =“foo”然后返回字符串连接implode（数组）;
Use ob_start();
使用ob_start（）; to cache the output: 缓存输出： ob_start();
ob_start（）; echo $a,$b,$c; echo $ a，$ b，$ c; $str = ob_get_contents(); $ str = ob_get_contents（）; ob_end_clean(); ob_end_clean（）; You can optimize if to switch and change the order to your expected result.
您可以优化是否切换并将订单更改为预期结果。 For example if result a is more likely then result b the condition to catch result a should be the first condition. 例如，如果结果a更可能那么结果b捕获结果的条件应该是第一个条件。 - Put a primary key and secondary key on your table(s). 在表上放置主键和辅助键。
1.1) Don't use a glue and don't add the construction of the array to the time. 1.1）不要使用胶水，也不要添加阵列的结构。 Here is a benchmark for http://www.sitecrafting.com/blog/php-string-concat-vs-array 1.2) http://dan.doezema.com/2011/07/php-output-profiling-echo-vs-concat ( although echo is fastest concat is slower then array and also he uses a glue! 1.3) https://stackoverflow.com/questions 1.4) http://www.sitepoint.com/high-performance-string-concatenation-in-php/ 以下是http://www.sitecrafting.com/blog/php-string-concat-vs-array 1.2）的基准测试http://dan.doezema.com/2011/07/php-output-profiling-echo- vs-concat （尽管echo是最快的concat比数组慢，而且他还使用胶水！1.3） https://stackoverflow.com/questions 1.4） http://www.sitepoint.com/high-performance-string-concatenation -in-PHP /
Here are my results (30000 strings, time in milliseconds) (Script is taken from 1.4):
standard: 0.02418089
implode w/ glue: 0.00435901
implode w/o glue: 0.02205801
foreach: 0.02081609
Conclusion: use implode with glue. 结论：使用胶水内爆。
解决方案2
2 2011-08-01 09:37:17
Your toHtml() is pointless (not to mention it's implemented poorly hence the low performance), you don't need to convert every unicode character to &#...; 你的toHtml（）是没有意义的（更不用说它实现得很差，因此性能很低），你不需要将每个unicode字符转换为＆＃...; notation, just put this in your <head> 记法，只需把它放在你的<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
and print utf-8 strings as they are, your browser will know how to deal with them. 并按原样打印utf-8字符串，您的浏览器将知道如何处理它们。
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