php开发中实用的PHP代码片段
下面我们一起来看我整理了在php开发中一些常用的php函数整理,希望这些函数代码地各位同学同样有帮助哦。
1.关键词高亮
<?php function highlight($sString, $aWords) { if (!is_array($aWords) || empty($aWords) || !is_string($sString)) { return false; } $sWords = implode('|', $aWords); return preg_replace('@b(' . $sWords . ')b@si', '<strong style="background-color:yellow">$1</strong>', $sString); } ?>
2.获取你的Feedburner的用户
<?php function get_average_readers($feed_id, $interval = 7) { $today = date('Y-m-d', strtotime("now")); $ago = date('Y-m-d', strtotime("-" . $interval . " days")); $feed_url = "https://feedburner.google.com/api/awareness/1.0/GetFeedData?uri=" . $feed_id . "&dates=" . $ago . "," . $today; $ch = curl_init(); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_URL, $feed_url); $data = curl_exec($ch); curl_close($ch); $xml = new SimpleXMLElement($data); $fb = $xml->feed->entry['circulation']; $nb = 0; foreach ($xml->feed->children() as $circ) { $nb+= $circ['circulation']; } return round($nb / $interval); } ?>
3.自动生成密码
<?php function generatePassword($length = 9, $strength = 0) { $vowels = 'aeuy'; $consonants = 'bdghjmnpqrstvz'; if ($strength >= 1) { $consonants.= 'BDGHJLMNPQRSTVWXZ'; } if ($strength >= 2) { $vowels.= "AEUY"; } if ($strength >= 4) { $consonants.= '23456789'; } if ($strength >= 8) { $vowels.= '@#$%'; } $password = ''; $alt = time() % 2; for ($i = 0; $i < $length; $i++) { if ($alt == 1) { $password.= $consonants[(rand() % strlen($consonants)) ]; $alt = 0; } else { $password.= $vowels[(rand() % strlen($vowels)) ]; $alt = 1; } } return $password; } ?>
4.压缩多个CSS文件
<?php header('Content-type: text/css'); ob_start("compress"); function compress($buffer) { /* remove comments */ $buffer = preg_replace('!/*[^*]**+([^/][^*]**+)*/!', '', $buffer); /* remove tabs, spaces, newlines, etc. */ $buffer = str_replace(array( "\r\n", "\r", "\n", "\t", ' ', ' ', ' ' ) , '', $buffer); return $buffer; } /* your css files */ include ('master.css'); include ('typography.css'); include ('grid.css'); include ('print.css'); include ('handheld.css'); ob_end_flush(); ?>
5.获取短网址
<?php function getTinyUrl($url) { return file_get_contents("http://tinyurl.com/api-create.php?url=".$url); } ?>
6.根据生日计算年龄
<?php function age($date) { $year_diff = ''; $time = strtotime($date); if (FALSE === $time) { return ''; } $date = date('Y-m-d', $time); list($year, $month, $day) = explode("-", $date); $year_diff = date("Y") & ndash; $year; $month_diff = date("m") & ndash; $month; $day_diff = date("d") & ndash; $day; if ($day_diff < 0 || $month_diff < 0) $year_diff & ndash;; return $year_diff; } ?>
7.计算执行时间
<?php //Create a variable for start time $time_start = microtime(true); // Place your PHP/HTML/JavaScript/CSS/Etc. Here //Create a variable for end time $time_end = microtime(true); //Subtract the two times to get seconds $time = $time_end - $time_start; echo 'Script took ' . $time . ' seconds to execute'; ?>
8.PHP的维护模式
<?php function maintenance($mode = FALSE) { if ($mode) { www . phprm . comif (basename($_SERVER['SCRIPT_FILENAME']) != 'maintenance.php') { header("Location: http://example.com/maintenance.php"); exit; } } else { if (basename($_SERVER['SCRIPT_FILENAME']) == 'maintenance.php') { header("Location: http://example.com/"); exit; } } } ?>
9.阻止CSS样式被缓存
<link href="/stylesheet.css?<?php echo time(); ?>" rel="stylesheet" type="text/css" >
10.数字增加 stndrd 等
function make_ranked($rank) { $last = substr( $rank, -1 ); $seclast = substr( $rank, -2, -1 ); if( $last > 3 || $last == 0 ) $ext = 'th'; else if( $last == 3 ) $ext = 'rd'; else if( $last == 2 ) $ext = 'nd'; else $ext = 'st'; if( $last == 1 && $seclast == 1) $ext = 'th'; if( $last == 2 && $seclast == 1) $ext = 'th'; if( $last == 3 && $seclast == 1) $ext = 'th'; return $rank.$ext; }
通过IP判断来源
这是一个非常实用的代码片段,可以帮助你通过IP来判断访客来源。下面的方法通过接收一个参数,然后返回IP所在地点。如果没有找到,则返回UNKNOWN。
<?php function detect_city($ip) { $default = 'UNKNOWN'; if (!is_string($ip) || strlen($ip) < 1 || $ip == '127.0.0.1' || $ip == 'localhost') $ip = '8.8.8.8'; $curlopt_useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)'; $url = 'http://ipinfodb.com/ip_locator.php?ip=' . urlencode($ip); $ch = curl_init(); $curl_opt = array( CURLOPT_FOLLOWLOCATION => 1, CURLOPT_HEADER => 0, CURLOPT_RETURNTRANSFER => 1, CURLOPT_USERAGENT => $curlopt_useragent, CURLOPT_URL => $url, CURLOPT_TIMEOUT => 1, CURLOPT_REFERER => 'http://' . $_SERVER['HTTP_HOST'], ); curl_setopt_array($ch, $curl_opt); $content = curl_exec($ch); if (!is_null($curl_info)) { $curl_info = curl_getinfo($ch); } curl_close($ch); if (preg_match('{<li>City : ([^<]*)</li>}i', $content, $regs)) { $city = $regs[1]; } if (preg_match('{<li>State/Province : ([^<]*)</li>}i', $content, $regs)) { $state = $regs[1]; } if ($city != '' && $state != '') { $location = $city . ', ' . $state; return $location; } else { return $default; } } ?>
判断一张图片的主色调
下面这个代码非常实用,能帮助你判断一张图片中的主色调,你可以分析任何图片。
<?php $i = imagecreatefromjpeg("image.jpg"); for ($x = 0; $x < imagesx($i); $x++) { for ($y = 0; $y < imagesy($i); $y++) { $rgb = imagecolorat($i, $x, $y); $r = ($rgb >> 16) & 0xFF; $g = ($rgb >> &0xFF; $b = $rgb & 0xFF; $rTotal+= $r; $gTotal+= $g; $bTotal+= $b; $total++; } } $rAverage = round($rTotal / $total); $gAverage = round($gTotal / $total); $bAverage = round($bTotal / $total); ?>
不显示PHP错误而发送电子邮件取代之
如果你不想在页面中显示PHP错误,也可以通过email来获取错误信息。下面的代码可以帮助你实现。
<?php // Our custom error handler function nettuts_error_handler($number, $message, $file, $line, $vars) { $email = " <p>An error ($number) occurred on line <strong>$line</strong> and in the <strong>file: $file.</strong> <p> $message </p>"; $email.= "<pre>" . print_r($vars, 1) . "</pre>"; $headers = 'Content-type: text/html; charset=iso-8859-1' . "\r\n"; // Email the error to someone... error_log($email, 1, 'you@youremail.com', $headers); // Make sure that you decide how to respond to errors (on the user's side) // Either echo an error message, or kill the entire project. Up to you... // The code below ensures that we only "die" if the error was more than // just a NOTICE. if (($number !== E_NOTICE) && ($number < 2048)) { die("There was an error. Please try again later."); } } // We should use our custom function to handle errors. set_error_handler('nettuts_error_handler'); // Trigger an error... (var doesn't exist) echo $somevarthatdoesnotexist; ?>
教程网址:http://www.phprm.com/code/58810.html
欢迎收藏∩_∩但请保留本文链接。