Web开发者必备的10个救命的PHP代码片段_PHP教程

[代码] 关键词高亮

1. function highlight($sString, $aWords) { 

2. if (!is_array ($aWords) || emptyempty ($aWords) || !is_string ($sString)) {
3. return false;
4. }
6. $sWords = implode ('|', $aWords);
7. return preg_replace ('@b('.$sWords.')b@si', '$1', $sString);
8. }

[代码] 获取你的Feedburner的用户

1. function get_average_readers($feed_id,$interval = 7){ 

2. $today = date('Y-m-d', strtotime("now"));
3. $ago = date('Y-m-d', strtotime("-".$interval." days"));
4. $feed_url="https://feedburner.google.com/api/awareness/1.0/GetFeedData?uri=".$feed_id."&dates=".$ago.",".$today;
5. $ch = curl_init();
6. curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
7. curl_setopt($ch, CURLOPT_URL, $feed_url);
8. $data = curl_exec($ch);
9. curl_close($ch);
10. $xml = new SimpleXMLElement($data);
11. $fb = $xml->feed->entry['circulation'];
13. $nb = 0;
14. foreach($xml->feed->children() as $circ){
15. $nb += $circ['circulation'];
16. }
18. return round($nb/$interval);
19. }

[代码] 自动生成密码

1. function generatePassword($length=9, $strength=0) { 

2. $vowels = 'aeuy';
3. $consonants = 'bdghjmnpqrstvz';
4. if ($strength >= 1) {
5. $consonants .= 'BDGHJLMNPQRSTVWXZ';
6. }
7. if ($strength >= 2) {
8. $vowels .= "AEUY";
9. }
10. if ($strength >= 4) {
11. $consonants .= '23456789';
12. }
13. if ($strength >= 8 ) {
14. $vowels .= '@#$%';
15. }
17. $password = '';
18. $alt = time() % 2;
19. for ($i = 0; $i < $length; $i++) {
20. if ($alt == 1) {
21. $password .= $consonants[(rand() % strlen($consonants))];
22. $alt = 0;
23. } else {
24. $password .= $vowels[(rand() % strlen($vowels))];
25. $alt = 1;
26. }
27. }
28. return $password;
29. }

[代码] 压缩多个CSS文件

1. header('Content-type: text/css'); 

2. ob_start("compress");
3. function compress($buffer) {
4. /* remove comments */
5. $buffer = preg_replace('!/*[^*]**+([^/][^*]**+)*/!', '', $buffer);
6. /* remove tabs, spaces, newlines, etc. */
7. $buffer = str_replace(array("rn", "r", "n", "t", ' ', ' ', ' '), '', $buffer);
8. return $buffer;
9. }
11. /* your css files */
12. include('master.css');
13. include('typography.css');
14. include('grid.css');
15. include('print.css');
16. include('handheld.css');
18. ob_end_flush();

[代码] 获取短网址

1. function getTinyUrl($url) { 

2. return file_get_contents("http://tinyurl.com/api-create.php?url=".$url);
3. }

[代码] 根据生日计算年龄

1. function age($date){ 

2. $year_diff = '';
3. $time = strtotime($date);
4. if(FALSE === $time){
5. return '';
6. }
8. $date = date('Y-m-d', $time);
9. list($year,$month,$day) = explode("-",$date);
10. $year_diff = date("Y") – $year;
11. $month_diff = date("m") – $month;
12. $day_diff = date("d") – $day;
13. if ($day_diff < 0 || $month_diff < 0) $year_diff–;
15. return $year_diff;
16. }

[代码] 计算执行时间

1. //Create a variable for start time  

2. $time_start = microtime(true);
4. // Place your PHP/HTML/JavaScript/CSS/Etc. Here
6. //Create a variable for end time
7. $time_end = microtime(true);
8. //Subtract the two times to get seconds
9. $time = $time_end - $time_start;
11. echo 'Script took '.$time.' seconds to execute';

[代码] PHP的维护模式

1. function maintenance($mode = FALSE){ 

2. if($mode){
3. if(basename($_SERVER['SCRIPT_FILENAME']) != 'maintenance.php'){
4. header("Location: http://example.com/maintenance.php");
5. exit;
6. }
7. }else{
8. if(basename($_SERVER['SCRIPT_FILENAME']) == 'maintenance.php'){
9. header("Location: http://example.com/");
10. exit;
11. }
12. }
13. }

[代码] 阻止CSS样式被缓存

1.  "/stylesheet.css? " rel="stylesheet" type="text/css" /&glt; 

[代码] 为数字增加 stndrd 等

1. function make_ranked($rank) { 

2. $last = substr( $rank, -1 );
3. $seclast = substr( $rank, -2, -1 );
4. if( $last > 3 || $last == 0 ) $ext = 'th';
5. else if( $last == 3 ) $ext = 'rd';
6. else if( $last == 2 ) $ext = 'nd';
7. else $ext = 'st';
9. if( $last == 1 && $seclast == 1) $ext = 'th';
10. if( $last == 2 && $seclast == 1) $ext = 'th';