搜尋
首頁後端開發php教程超實用PHP函數總結整理

超實用PHP函數總結整理

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Aug 08, 2016 am 09:33 AM
functiongtstrstring

1、PHP加密解密

PHP加密和解密函數可以用來加密一些有用的字串存放在資料庫裡，並且透過可逆解密字串，該函數使用了base64和MD5加密和解密。 

<span> 1</span> <span>function</span> encryptDecrypt(<span>$key</span>, <span>$string</span>, <span>$decrypt</span><span>){ 
</span><span> 2</span> 
<span> 3</span>     <span>if</span>(<span>$decrypt</span><span>){ 
</span><span> 4</span> 
<span> 5</span>         <span>$decrypted</span> = <span>rtrim</span>(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, <span>md5</span>(<span>$key</span>), <span>base64_decode</span>
<span> 6</span>        (<span>$string</span>), MCRYPT_MODE_CBC, <span>md5</span>(<span>md5</span>(<span>$key</span>))), "12"<span>); 
</span><span> 7</span> 
<span> 8</span>         <span>return</span> <span>$decrypted</span><span>; 
</span><span> 9</span> 
<span>10</span>     }<span>else</span><span>{ 
</span><span>11</span> 
<span>12</span>         <span>$encrypted</span> = <span>base64_encode</span>(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, <span>md5</span>(<span>$key</span>),
<span>13</span>        <span>$string</span>, MCRYPT_MODE_CBC, <span>md5</span>(<span>md5</span>(<span>$key</span><span>)))); 
</span><span>14</span> 
<span>15</span>         <span>return</span> <span>$encrypted</span><span>; 
</span><span>16</span> 
<span>17</span> <span>    } 
</span><span>18</span> 
<span>19</span> }

使用方法如下：

<span>1</span> <span>//</span><span>以下是将字符串“Helloweba欢迎您”分别加密和解密 
</span><span>2</span> 
<span>3</span> <span>//加密： </span>
<span>4</span> 
<span>5</span> <span>echo</span> encryptDecrypt('password', 'Helloweba欢迎您',0<span>); 
</span><span>6</span> 
<span>7</span> <span>//</span><span>解密： </span>
<span>8</span> 
<span>9</span> <span>echo</span> encryptDecrypt('password', 'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=',1);

2、PHP產生隨機字串

       當我們需要產生一個隨機名字，臨時密碼等字串時可以用到下面的函數：

<span> 1</span> <span>function</span> generateRandomString(<span>$length</span> = 10<span>) { 
</span><span> 2</span> 
<span> 3</span>     <span>$characters</span> = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'<span>; 
</span><span> 4</span> 
<span> 5</span>     <span>$randomString</span> = ''<span>; 
</span><span> 6</span> 
<span> 7</span>     <span>for</span> (<span>$i</span> = 0; <span>$i</span> $length; <span>$i</span>++<span>) { 
</span><span> 8</span> 
<span> 9</span>         <span>$randomString</span> .= <span>$characters</span>[<span>rand</span>(0, <span>strlen</span>(<span>$characters</span>) - 1<span>)]; 
</span><span>10</span> 
<span>11</span> <span>    } 
</span><span>12</span> 
<span>13</span>     <span>return</span> <span>$randomString</span><span>; 
</span><span>14</span> 
<span>15</span> }

  使用方法如下：

<span>1</span> <span>echo</span> generateRandomString(20);

3、PHP取得檔案副檔名（後綴）

 以下函數可以快速取得檔案的副檔名即後綴。 

<span>1</span> <span>function</span> getExtension(<span>$filename</span><span>){ 
</span><span>2</span> 
<span>3</span>   <span>$myext</span> = <span>substr</span>(<span>$filename</span>, <span>strrpos</span>(<span>$filename</span>, '.'<span>)); 
</span><span>4</span> 
<span>5</span>   <span>return</span> <span>str_replace</span>('.','',<span>$myext</span><span>); 
</span><span>6</span> 
<span>7</span> }

使用方法如下：

<span>1</span> <span>$filename</span> = '我的文档.doc'<span>; 
</span><span>2</span> 
<span>3</span> <span>echo</span> getExtension(<span>$filename</span>);

4、PHP取得檔案大小並格式化

以下使用的函數可以取得檔案的大小，並且轉換成方便閱讀的KB，MB等格式。 

<span> 1</span> <span>function</span> formatSize(<span>$size</span><span>) { 
</span><span> 2</span> 
<span> 3</span>     <span>$sizes</span> = <span>array</span>(" Bytes", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB"<span>); 
</span><span> 4</span> 
<span> 5</span>     <span>if</span> (<span>$size</span> == 0<span>) {  
</span><span> 6</span> 
<span> 7</span>         <span>return</span>('n/a'<span>);  
</span><span> 8</span> 
<span> 9</span>     } <span>else</span><span> { 
</span><span>10</span> 
<span>11</span>       <span>return</span> (<span>round</span>(<span>$size</span>/<span>pow</span>(1024, (<span>$i</span> = <span>floor</span>(<span>log</span>(<span>$size</span>, 1024)))), 2) . <span>$sizes</span>[<span>$i</span><span>]);  
</span><span>12</span> 
<span>13</span> <span>    } 
</span><span>14</span> 
<span>15</span> }

使用方法如下：

<span>1</span> <span>$thefile</span> = <span>filesize</span>('test_file.mp3'<span>); 
</span><span>2</span> 
<span>3</span> <span>echo</span> formatSize(<span>$thefile</span>);

5、PHP替換標籤字元

有時我們需要將字串、模板標籤替換成指定的內容，可以用到下面的函數：

<span> 1</span> <span>function</span> stringParser(<span>$string</span>,<span>$replacer</span><span>){ 
</span><span> 2</span> 
<span> 3</span>     <span>$result</span> = <span>str_replace</span>(<span>array_keys</span>(<span>$replacer</span>), <span>array_values</span>(<span>$replacer</span>),<span>$string</span><span>); 
</span><span> 4</span> 
<span> 5</span>     <span>return</span> <span>$result</span><span>; 
</span><span> 6</span> 
<span> 7</span> <span>}
</span><span> 8</span> 
<span> 9</span> <span>//</span><span>使用方法如下</span>
<span>10</span> 
<span>11</span> <span>$string</span> = '<span>The {b}anchor text{/b} is the {b}actual word{/b} or words used 
</span><span>12</span> {br}to describe the link {br}itself'<span>; 
</span><span>13</span> 
<span>14</span> <span>$replace_array</span> = <span>array</span>('{b}' => '<b>','{/b}' => '</b>','{br}' => '<br>'<span>); 
</span><span>15</span> 
<span>16</span>  
<span>17</span> 
<span>18</span> <span>echo</span> stringParser(<span>$string</span>,<span>$replace_array</span>);

6、PHP列出目錄下的檔案名稱

如果你想列出目錄下的所有文件，使用以下程式碼即可：

<span> 1</span> <span>function</span> listDirFiles(<span>$DirPath</span><span>){ 
</span><span> 2</span> 
<span> 3</span>     <span>if</span>(<span>$dir</span> = <span>opendir</span>(<span>$DirPath</span><span>)){ 
</span><span> 4</span> 
<span> 5</span>          <span>while</span>((<span>$file</span> = <span>readdir</span>(<span>$dir</span>))!== <span>false</span><span>){ 
</span><span> 6</span> 
<span> 7</span>                 <span>if</span>(!<span>is_dir</span>(<span>$DirPath</span>.<span>$file</span><span>)) 
</span><span> 8</span> 
<span> 9</span> <span>                { 
</span><span>10</span> 
<span>11</span>                     <span>echo</span> "filename: <span>$file</span><br>"<span>; 
</span><span>12</span> 
<span>13</span> <span>                } 
</span><span>14</span> 
<span>15</span> <span>         } 
</span><span>16</span> 
<span>17</span> <span>    } 
</span><span>18</span> 
<span>19</span> <span>}
</span><span>20</span> 
<span>21</span> <span>//</span><span>使用方法如下</span>
<span>22</span> 
<span>23</span> listDirFiles('home/some_folder/');

7、PHP取得目前頁面URL

以下函數可以取得目前頁面的URL，不管是http或https。 

<span> 1</span> <span>function</span><span> curPageURL() { 
</span><span> 2</span> 
<span> 3</span>     <span>$pageURL</span> = 'http'<span>; 
</span><span> 4</span> 
<span> 5</span>     <span>if</span> (!<span>empty</span>(<span>$_SERVER</span>['HTTPS'])) {<span>$pageURL</span> .= "s"<span>;} 
</span><span> 6</span> 
<span> 7</span>     <span>$pageURL</span> .= "://"<span>; 
</span><span> 8</span> 
<span> 9</span>     <span>if</span> (<span>$_SERVER</span>["SERVER_PORT"] != "80"<span>) { 
</span><span>10</span> 
<span>11</span>         <span>$pageURL</span> .= <span>$_SERVER</span>["SERVER_NAME"].":".<span>$_SERVER</span>["SERVER_PORT"].<span>$_SERVER</span>
<span>12</span> ["REQUEST_URI"<span>]; 
</span><span>13</span> 
<span>14</span>     } <span>else</span><span> { 
</span><span>15</span> 
<span>16</span>         <span>$pageURL</span> .= <span>$_SERVER</span>["SERVER_NAME"].<span>$_SERVER</span>["REQUEST_URI"<span>]; 
</span><span>17</span> 
<span>18</span> <span>    } 
</span><span>19</span> 
<span>20</span>     <span>return</span> <span>$pageURL</span><span>; 
</span><span>21</span> 
<span>22</span> <span>}
</span><span>23</span> 
<span>24</span> <span>//</span><span>使用方法如下</span>
<span>25</span> 
<span>26</span> <span>echo</span> curPageURL();

8、PHP強制下載檔案

有時我們不想讓瀏覽器直接打開文件，例如PDF文件，而是要直接下載文件，那麼以下函數可以強制下載文件，函數中使用了application/octet-stream頭類型。 

<span> 1</span> <span>function</span> download(<span>$filename</span><span>){ 
</span><span> 2</span> 
<span> 3</span>     <span>if</span> ((<span>isset</span>(<span>$filename</span>))&&(<span>file_exists</span>(<span>$filename</span><span>))){ 
</span><span> 4</span> 
<span> 5</span>        <span>header</span>("Content-length: ".<span>filesize</span>(<span>$filename</span><span>)); 
</span><span> 6</span> 
<span> 7</span>        <span>header</span>('Content-Type: application/octet-stream'<span>); 
</span><span> 8</span> 
<span> 9</span>        <span>header</span>('Content-Disposition: attachment; filename="' . <span>$filename</span> . '"'<span>); 
</span><span>10</span> 
<span>11</span>        <span>readfile</span>("<span>$filename</span>"<span>); 
</span><span>12</span> 
<span>13</span>     } <span>else</span><span> { 
</span><span>14</span> 
<span>15</span>        <span>echo</span> "Looks like file does not exist!"<span>; 
</span><span>16</span> 
<span>17</span> <span>    } 
</span><span>18</span> 
<span>19</span> <span>}
</span><span>20</span> 
<span>21</span> <span>//</span><span>使用方法如下</span>
<span>22</span> 
<span>23</span> download('/down/test_45f73e852.zip');

9、PHP截取字串長度

我們常常會遇到需要截取字串(含中文漢字)長度的情況，例如標題顯示不能超過多少字符，超出的長度用…表示，以下函數可以滿足你的需求。 

<span> 1</span> <span>/*</span> 
<span> 2</span> 
<span> 3</span> <span> Utf-8、gb2312都支持的汉字截取函数 
</span><span> 4</span> 
<span> 5</span> <span> cut_str(字符串, 截取长度, 开始长度, 编码); 
</span><span> 6</span> 
<span> 7</span> <span> 编码默认为 utf-8 
</span><span> 8</span> 
<span> 9</span> <span> 开始长度默认为 0 
</span><span>10</span> 
<span>11</span> <span>*/</span> 
<span>12</span> 
<span>13</span> <span>function</span> cutStr(<span>$string</span>, <span>$sublen</span>, <span>$start</span> = 0, <span>$code</span> = 'UTF-8'<span>){ 
</span><span>14</span> 
<span>15</span>     <span>if</span>(<span>$code</span> == 'UTF-8'<span>){ 
</span><span>16</span> 
<span>17</span>         <span>$pa</span> = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/"<span>; 
</span><span>18</span> 
<span>19</span>         <span>preg_match_all</span>(<span>$pa</span>, <span>$string</span>, <span>$t_string</span><span>); 
</span><span>20</span> 
<span>21</span>  
<span>22</span> 
<span>23</span>         <span>if</span>(<span>count</span>(<span>$t_string</span>[0]) - <span>$start</span> > <span>$sublen</span>) <span>return</span> <span>join</span>('', <span>array_slice</span>
<span>24</span> (<span>$t_string</span>[0], <span>$start</span>, <span>$sublen</span>))."..."<span>; 
</span><span>25</span> 
<span>26</span>         <span>return</span> <span>join</span>('', <span>array_slice</span>(<span>$t_string</span>[0], <span>$start</span>, <span>$sublen</span><span>)); 
</span><span>27</span> 
<span>28</span>     }<span>else</span><span>{ 
</span><span>29</span> 
<span>30</span>         <span>$start</span> = <span>$start</span>*2<span>; 
</span><span>31</span> 
<span>32</span>         <span>$sublen</span> = <span>$sublen</span>*2<span>; 
</span><span>33</span> 
<span>34</span>         <span>$strlen</span> = <span>strlen</span>(<span>$string</span><span>); 
</span><span>35</span> 
<span>36</span>         <span>$tmpstr</span> = ''<span>; 
</span><span>37</span> 
<span>38</span>  
<span>39</span> 
<span>40</span>         <span>for</span>(<span>$i</span>=0; <span>$i</span>$strlen; <span>$i</span>++<span>){ 
</span><span>41</span> 
<span>42</span>             <span>if</span>(<span>$i</span>>=<span>$start</span> && <span>$i</span>$start+<span>$sublen</span><span>)){ 
</span><span>43</span> 
<span>44</span>                 <span>if</span>(<span>ord</span>(<span>substr</span>(<span>$string</span>, <span>$i</span>, 1))>129<span>){ 
</span><span>45</span> 
<span>46</span>                     <span>$tmpstr</span>.= <span>substr</span>(<span>$string</span>, <span>$i</span>, 2<span>); 
</span><span>47</span> 
<span>48</span>                 }<span>else</span><span>{ 
</span><span>49</span> 
<span>50</span>                     <span>$tmpstr</span>.= <span>substr</span>(<span>$string</span>, <span>$i</span>, 1<span>); 
</span><span>51</span> 
<span>52</span> <span>                } 
</span><span>53</span> 
<span>54</span> <span>            } 
</span><span>55</span> 
<span>56</span>             <span>if</span>(<span>ord</span>(<span>substr</span>(<span>$string</span>, <span>$i</span>, 1))>129) <span>$i</span>++<span>; 
</span><span>57</span> 
<span>58</span> <span>        } 
</span><span>59</span> 
<span>60</span>         <span>if</span>(<span>strlen</span>(<span>$tmpstr</span>)$strlen ) <span>$tmpstr</span>.= "..."<span>; 
</span><span>61</span> 
<span>62</span>         <span>return</span> <span>$tmpstr</span><span>; 
</span><span>63</span> 
<span>64</span> <span>    } 
</span><span>65</span> 
<span>66</span> <span>}
</span><span>67</span> 
<span>68</span> <span>//</span><span>使用方法如下</span>
<span>69</span> 
<span>70</span> <span>$str</span> = "jQuery插件实现的加载图片和页面效果"<span>; 
</span><span>71</span> 
<span>72</span> <span>echo</span> cutStr(<span>$str</span>,16);

10、PHP取得客戶端真實IP

我們常常要用資料庫記錄使用者的IP，以下程式碼可以取得客戶端真實的IP：

<span> 1</span> <span>//</span><span>获取用户真实IP </span>
<span> 2</span> 
<span> 3</span> <span>function</span><span> getIp() { 
</span><span> 4</span> 
<span> 5</span>     <span>if</span> (<span>getenv</span>("HTTP_CLIENT_IP") && <span>strcasecmp</span>(<span>getenv</span>("HTTP_CLIENT_IP"),
<span> 6</span>  "unknown"<span>)) 
</span><span> 7</span> 
<span> 8</span>         <span>$ip</span> = <span>getenv</span>("HTTP_CLIENT_IP"<span>); 
</span><span> 9</span> 
<span>10</span>     <span>else</span> 
<span>11</span> 
<span>12</span>         <span>if</span> (<span>getenv</span>("HTTP_X_FORWARDED_FOR") && <span>strcasecmp</span>(<span>getenv</span>("HTTP_X_FORWARDED_FOR"), "unknown"<span>)) 
</span><span>13</span> 
<span>14</span>             <span>$ip</span> = <span>getenv</span>("HTTP_X_FORWARDED_FOR"<span>); 
</span><span>15</span> 
<span>16</span>         <span>else</span> 
<span>17</span> 
<span>18</span>             <span>if</span> (<span>getenv</span>("REMOTE_ADDR") && <span>strcasecmp</span>(<span>getenv</span>("REMOTE_ADDR"), "unknown"<span>)) 
</span><span>19</span> 
<span>20</span>                 <span>$ip</span> = <span>getenv</span>("REMOTE_ADDR"<span>); 
</span><span>21</span> 
<span>22</span>             <span>else</span> 
<span>23</span> 
<span>24</span>                 <span>if</span> (<span>isset</span> (<span>$_SERVER</span>['REMOTE_ADDR']) && <span>$_SERVER</span>['REMOTE_ADDR'] && 
<span>25</span> <span>strcasecmp</span>(<span>$_SERVER</span>['REMOTE_ADDR'], "unknown"<span>)) 
</span><span>26</span> 
<span>27</span>                     <span>$ip</span> = <span>$_SERVER</span>['REMOTE_ADDR'<span>]; 
</span><span>28</span> 
<span>29</span>                 <span>else</span> 
<span>30</span> 
<span>31</span>                     <span>$ip</span> = "unknown"<span>; 
</span><span>32</span> 
<span>33</span>     <span>return</span> (<span>$ip</span><span>); 
</span><span>34</span> 
<span>35</span> <span>}
</span><span>36</span> 
<span>37</span> <span>//</span><span>使用方法如下</span>
<span>38</span> 
<span>39</span> <span>echo</span> getIp();

11、PHP防止SQL注入

我們在查詢資料庫時，出於安全考慮，需要過濾一些非法字元以防止SQL惡意注入，請看一下函數：

<span> 1</span> <span>function</span> injCheck(<span>$sql_str</span><span>) {  
</span><span> 2</span> 
<span> 3</span>     <span>$check</span> = <span>preg_match</span>('<span>/select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into
</span><span> 4</span> |load_file|outfile/', <span>$sql_str</span><span>); 
</span><span> 5</span> 
<span> 6</span>     <span>if</span> (<span>$check</span><span>) { 
</span><span> 7</span> 
<span> 8</span>         <span>echo</span> '非法字符！！'<span>; 
</span><span> 9</span> 
<span>10</span>         <span>exit</span><span>; 
</span><span>11</span> 
<span>12</span>     } <span>else</span><span> { 
</span><span>13</span> 
<span>14</span>         <span>return</span> <span>$sql_str</span><span>; 
</span><span>15</span> 
<span>16</span> <span>    } 
</span><span>17</span> 
<span>18</span> <span>}
</span><span>19</span> 
<span>20</span> <span>//</span><span>使用方法如下</span>
<span>21</span> 
<span>22</span> <span>echo</span> injCheck('1 or 1=1');

12、PHP頁提示與跳轉

我們在進行表單操作時，有時為了友好需要提示使用者操作結果，並跳到相關頁面，請看以下函數：

<span> 1</span> <span>function</span> message(<span>$msgTitle</span>,<span>$message</span>,<span>$jumpUrl</span><span>){ 
</span><span> 2</span>     <span>$str</span> = ''<span>; 
</span><span> 3</span>     <span>$str</span> .= ''<span>; 
</span><span> 4</span>     <span>$str</span> .= ''<span>; 
</span><span> 5</span>     <span>$str</span> .= '<meta charset="utf-8">'<span>; 
</span><span> 6</span>     <span>$str</span> .= '<title>页面提示</title>'<span>; 
</span><span> 7</span>     <span>$str</span> .= '<style type="text/css">'<span>; 
<span> 8     <span>$str .= '<span>*{margin:0; padding:0}a{color:#369; text-decoration:none;}a:hover{text-decoration:underline}body{height:100%; font:12px/18px Tahoma, Arial,  sans-serif; color:#424242; background:#fff}.message{width:450px; height:120px; 
<span> 9 <span>margin:16% auto; border:1px solid #99b1c4; background:#ecf7fb}.message h3{height:28px; 
<span>10 line-height:28px; background:#2c91c6; text-align:center; color:#fff; font-size:14px}.msg_txt{padding:10px; margin-top:8px}.msg_txt h4{line-height:26px; font-size:14px}.msg_txt h4.red{color:#f30}.msg_txt p{line-height:22px}'<span>; 
<span>11     <span>$str .= '</style>'<span>; 
</span><span>12</span>     <span>$str</span> .= ''<span>; 
</span><span>13</span>     <span>$str</span> .= ''<span>; 
</span><span>14</span>     <span>$str</span> .= '<div>'<span>; 
</span><span>15</span>     <span>$str</span> .= '<h3 id="span-msgTitle-span">'.<span>$msgTitle</span>.'</h3>'<span>; 
</span><span>16</span>     <span>$str</span> .= '<div>'<span>; 
</span><span>17</span>     <span>$str</span> .= '<h4 id="span-message-span">'.<span>$message</span>.'</h4>'<span>; 
</span><span>18</span>     <span>$str</span> .= '<p>系统将在 <span>3</span> 秒后自动跳转,如果不想等待,直接点击 <a href="%7B%24jumpUrl%7D">这里</a> 跳转</p>'<span>; 
</span><span>19</span>     <span>$str</span> .= "<script>setTimeout('location.replace(\'".<span>$jumpUrl."\')',2000)</script>"<span>; 
</span><span>20</span>     <span>$str</span> .= '</div>'<span>; 
</span><span>21</span>     <span>$str</span> .= '</div>'<span>; 
</span><span>22</span>     <span>$str</span> .= ''<span>; 
</span><span>23</span>     <span>$str</span> .= ''<span>; 
</span><span>24</span>     <span>echo</span> <span>$str</span><span>; 
</span><span>25</span> <span>}
</span><span>26</span> 
<span>27</span> <span>//</span><span>使用方法如下 </span>
<span>28</span> 
<span>29</span> message('操作提示','操作成功！','http://www.helloweba.com/');

13、PHP計算時長

我們在處理時間時，需要計算當前時間距離某個時間點的時長，如計算客戶端運行時長，通常用hh:mm:ss表示。 

<span> 1</span> <span>function</span> changeTimeType(<span>$seconds</span><span>) { 
</span><span> 2</span> 
<span> 3</span>     <span>if</span> (<span>$seconds</span> > 3600<span>) { 
</span><span> 4</span> 
<span> 5</span>         <span>$hours</span> = <span>intval</span>(<span>$seconds</span> / 3600<span>); 
</span><span> 6</span> 
<span> 7</span>         <span>$minutes</span> = <span>$seconds</span> % 3600<span>; 
</span><span> 8</span> 
<span> 9</span>         <span>$time</span> = <span>$hours</span> . ":" . <span>gmstrftime</span>('%M:%S', <span>$minutes</span><span>); 
</span><span>10</span> 
<span>11</span>     } <span>else</span><span> { 
</span><span>12</span> 
<span>13</span>         <span>$time</span> = <span>gmstrftime</span>('%H:%M:%S', <span>$seconds</span><span>); 
</span><span>14</span> 
<span>15</span> <span>    } 
</span><span>16</span> 
<span>17</span>     <span>return</span> <span>$time</span><span>; 
</span><span>18</span> 
<span>19</span> <span>}
</span><span>20</span> 
<span>21</span> <span>//</span><span>使用方法如下</span>
<span>22</span> 
<span>23</span> <span>$seconds</span> = 3712<span>; 
</span><span>24</span> 
<span>25</span> <span>echo</span> changeTimeType(<span>$seconds</span>);

以上就介紹了超實用PHP函數總結整理，包括了方面的內容，希望對PHP教程有興趣的朋友有所幫助。

陳述
本文內容由網友自願投稿，版權歸原作者所有。本站不承擔相應的法律責任。如發現涉嫌抄襲或侵權的內容，請聯絡admin@php.cn
相關文章
超越炒作：評估當今PHP的角色超越炒作：評估當今PHP的角色Apr 12, 2025 am 12:17 AM

PHP在現代編程中仍然是一個強大且廣泛使用的工具，尤其在web開發領域。 1)PHP易用且與數據庫集成無縫，是許多開發者的首選。 2)它支持動態內容生成和麵向對象編程，適合快速創建和維護網站。 3)PHP的性能可以通過緩存和優化數據庫查詢來提升，其廣泛的社區和豐富生態系統使其在當今技術棧中仍具重要地位。

PHP中的弱參考是什麼？什麼時候有用？PHP中的弱參考是什麼？什麼時候有用？Apr 12, 2025 am 12:13 AM

在PHP中，弱引用是通過WeakReference類實現的，不會阻止垃圾回收器回收對象。弱引用適用於緩存系統和事件監聽器等場景，需注意其不能保證對象存活，且垃圾回收可能延遲。

解釋PHP中的__ Invoke Magic方法。解釋PHP中的__ Invoke Magic方法。Apr 12, 2025 am 12:07 AM

\_\_invoke方法允許對象像函數一樣被調用。 1.定義\_\_invoke方法使對象可被調用。 2.使用$obj(...)語法時，PHP會執行\_\_invoke方法。 3.適用於日誌記錄和計算器等場景，提高代碼靈活性和可讀性。

解釋PHP 8.1中的纖維以進行並發。解釋PHP 8.1中的纖維以進行並發。Apr 12, 2025 am 12:05 AM

Fibers在PHP8.1中引入，提升了並發處理能力。 1)Fibers是一種輕量級的並發模型，類似於協程。 2)它們允許開發者手動控制任務的執行流，適合處理I/O密集型任務。 3)使用Fibers可以編寫更高效、響應性更強的代碼。

PHP社區：資源，支持和發展PHP社區：資源，支持和發展Apr 12, 2025 am 12:04 AM

PHP社區提供了豐富的資源和支持，幫助開發者成長。 1)資源包括官方文檔、教程、博客和開源項目如Laravel和Symfony。 2)支持可以通過StackOverflow、Reddit和Slack頻道獲得。 3)開發動態可以通過關注RFC了解。 4)融入社區可以通過積極參與、貢獻代碼和學習分享來實現。

PHP與Python：了解差異PHP與Python：了解差異Apr 11, 2025 am 12:15 AM

PHP和Python各有優勢，選擇應基於項目需求。 1.PHP適合web開發，語法簡單，執行效率高。 2.Python適用於數據科學和機器學習，語法簡潔，庫豐富。

php：死亡還是簡單地適應？php：死亡還是簡單地適應？Apr 11, 2025 am 12:13 AM

PHP不是在消亡，而是在不斷適應和進化。 1)PHP從1994年起經歷多次版本迭代，適應新技術趨勢。 2)目前廣泛應用於電子商務、內容管理系統等領域。 3)PHP8引入JIT編譯器等功能，提升性能和現代化。 4)使用OPcache和遵循PSR-12標準可優化性能和代碼質量。

PHP的未來：改編和創新PHP的未來：改編和創新Apr 11, 2025 am 12:01 AM

PHP的未來將通過適應新技術趨勢和引入創新特性來實現：1)適應云計算、容器化和微服務架構，支持Docker和Kubernetes；2)引入JIT編譯器和枚舉類型，提升性能和數據處理效率；3)持續優化性能和推廣最佳實踐。

See all articles

熱AI工具

Undresser.AI Undress

Undresser.AI Undress

人工智慧驅動的應用程序，用於創建逼真的裸體照片

AI Clothes Remover

AI Clothes Remover

用於從照片中去除衣服的線上人工智慧工具。

Undress AI Tool

Undress AI Tool

免費脫衣圖片

Clothoff.io

Clothoff.io

AI脫衣器

AI Hentai Generator

AI Hentai Generator

免費產生 AI 無盡。

顯示更多

熱門文章

R.E.P.O.能量晶體解釋及其做什麼（黃色晶體）
3 週前By尊渡假赌尊渡假赌尊渡假赌
R.E.P.O.最佳圖形設置
3 週前By尊渡假赌尊渡假赌尊渡假赌
刺客信條陰影：貝殼謎語解決方案
2 週前ByDDD
R.E.P.O.如果您聽不到任何人，如何修復音頻
3 週前By尊渡假赌尊渡假赌尊渡假赌
WWE 2K25：如何解鎖Myrise中的所有內容
3 週前By尊渡假赌尊渡假赌尊渡假赌
顯示更多

熱工具

mPDF

mPDF

mPDF是一個PHP庫，可以從UTF-8編碼的HTML產生PDF檔案。原作者Ian Back編寫mPDF以從他的網站上「即時」輸出PDF文件，並處理不同的語言。與原始腳本如HTML2FPDF相比，它的速度較慢，並且在使用Unicode字體時產生的檔案較大，但支援CSS樣式等，並進行了大量增強。支援幾乎所有語言，包括RTL（阿拉伯語和希伯來語）和CJK（中日韓）。支援嵌套的區塊級元素（如P、DIV），

DVWA

DVWA

Damn Vulnerable Web App (DVWA) 是一個PHP/MySQL的Web應用程序，非常容易受到攻擊。它的主要目標是成為安全專業人員在合法環境中測試自己的技能和工具的輔助工具，幫助Web開發人員更好地理解保護網路應用程式的過程，並幫助教師/學生在課堂環境中教授/學習Web應用程式安全性。 DVWA的目標是透過簡單直接的介面練習一些最常見的Web漏洞，難度各不相同。請注意，該軟體中

SecLists

SecLists

SecLists是最終安全測試人員的伙伴。它是一個包含各種類型清單的集合，這些清單在安全評估過程中經常使用，而且都在一個地方。 SecLists透過方便地提供安全測試人員可能需要的所有列表，幫助提高安全測試的效率和生產力。清單類型包括使用者名稱、密碼、URL、模糊測試有效載荷、敏感資料模式、Web shell等等。測試人員只需將此儲存庫拉到新的測試機上，他就可以存取所需的每種類型的清單。

記事本++7.3.1

記事本++7.3.1

好用且免費的程式碼編輯器

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

這個專案正在遷移到osdn.net/projects/mingw的過程中，你可以繼續在那裡關注我們。 MinGW：GNU編譯器集合（GCC）的本機Windows移植版本，可自由分發的導入函式庫和用於建置本機Windows應用程式的頭檔；包括對MSVC執行時間的擴展，以支援C99功能。 MinGW的所有軟體都可以在64位元Windows平台上運作。

顯示更多

熱門話題

gmail信箱登陸入口在哪裡
7467
15
CakePHP 教程
1376
52
steam的賬戶名稱是什麼格式
77
11
win11激活密鑰永久
46
19
NYT連接提示和答案
18
20
顯示更多