bsp;
13. PHP寻找两个字符串的相似性
PHP 提供了一个极少使用的 similar_text 函数,但此函数非常有用,用于比较两个字符串并返回相似程度的百分比。
- similar_text($string1, $string2, $percent);
- //$percent will have the percentage of similarity
14. PHP在应用程序中使用 Gravatar 通用头像
随着 WordPress 越来越普及,Gravatar 也随之流行。由于 Gravatar 提供了易于使用的 API,将其纳入应用程序也变得十分方便。
- /******************
- *@email - Email address to show gravatar for
- *@size - size of gravatar
- *@default - URL of default gravatar to use
- *@rating - rating of Gravatar(G, PG, R, X)
- */
- function show_gravatar($email, $size, $default, $rating)
- {
- echo ''<img src="http://www.gravatar.com/avatar.php?gravatar_id=''.md5($email).
- ''&default=''.$default.''&size=''.$size.''&rating=''.$rating.''" width="''.$size.''px"
- height="''.$size.''px" />'';
- }
15. PHP在字符断点处截断文字
所谓断字 (word break),即一个单词可在转行时断开的地方。这一函数将在断字处截断字符串。
- // Original PHP code by Chirp Internet: www.chirp.com.au
- // Please acknowledge use of this code by including this header.
- function myTruncate($string, $limit, $break=".", $pad="...") {
- // return with no change if string is shorter than $limit
- if(strlen($string) <= $limit)
- return $string;
-
- // is $break present between $limit and the end of the string?
- if(false !== ($breakpoint = strpos($string, $break, $limit))) {
- if($breakpoint < strlen($string) - 1) {
- $string = substr($string, 0, $breakpoint) . $pad;
- }
- }
- return $string;
- }
- /***** Example ****/
- $short_string=myTruncate($long_string, 100, '' '');
16. PHP文件 Zip 压缩
- /* creates a compressed zip file */
- function create_zip($files = array(),$destination = '''',$overwrite = false) {
- //if the zip file already exists and overwrite is false, return false
- if(file_exists($destination) && !$overwrite) { return false; }
- //vars
- $valid_files = array();
- //if files were passed in...
- if(is_array($files)) {
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