编写php拓展实例-php手册-php.cn

最近公司换了yaf框架，突然对用c实现php拓展感兴趣了，如果一个功能已经很稳定很成熟而且用的地方很多，那么我们就可以尝试用拓展实现（不一定每种情况都可以写成拓展），写成拓展后就不用每次用都包含一下，工具类直接随php启动加载进内存里。我这次是把用

最近公司换了yaf框架，突然对用c实现php拓展感兴趣了，如果一个功能已经很稳定很成熟而且用的地方很多，那么我们就可以尝试用拓展实现（不一定每种情况都可以写成拓展），写成拓展后就不用每次用都包含一下，工具类直接随php启动加载进内存里。

我这次是把用户会话加密类写成了php的拓展，用户类是基于des加密的，主要实现了，

isLogin //判断是否登录
setLogin //就是种个加密的cookie
getUid
getUsername

我给这个项目起名slime（史莱姆），勇者斗恶龙里的小怪，黏黏的。。。。。。

ok，先来看下php的实现，因为我们是php -> c,所以先看下php的实现，其实就是很普通用户类

<span> 1</span> <span>php
</span><span> 2</span> <span>class</span><span> Session_DES
</span><span> 3</span> <span>{
</span><span> 4</span>     <span>var</span> <span>$key</span><span>;
</span><span> 5</span>     <span>var</span> <span>$iv</span>; <span>//</span><span>偏移量</span>
<span> 6</span>     
<span> 7</span>     <span>function</span> Session_DES( <span>$key</span>="AAAAAAAA", <span>$iv</span>="BBBBBBBB"<span>) {
</span><span> 8</span>     <span>//</span><span>key长度8例如:1234abcd</span>
<span> 9</span>         <span>$this</span>-><span>key</span> = <span>$key</span><span>;
</span><span>10</span>         <span>if</span>( <span>$iv</span> == ""<span> ) {
</span><span>11</span>             <span>$this</span>->iv = <span>$key</span>; <span>//</span><span>默认以$key 作为 iv</span>
<span>12</span>         } <span>else</span><span> {
</span><span>13</span>             <span>$this</span>->iv = <span>$iv</span>; <span>//</span><span>mcrypt_create_iv ( mcrypt_get_block_size (MCRYPT_DES, MCRYPT_MODE_CBC), MCRYPT_DEV_RANDOM );</span>
<span>14</span> <span>        }
</span><span>15</span> <span>    }
</span><span>16</span>     
<span>17</span>     <span>function</span> encrypt(<span>$str</span><span>) {
</span><span>18</span>     <span>//</span><span>加密，返回大写十六进制字符串</span>
<span>19</span>         <span>$size</span> = mcrypt_get_block_size ( MCRYPT_DES,<span> MCRYPT_MODE_CBC );
</span><span>20</span>         <span>$str</span> = <span>$this</span>->pkcs5Pad ( <span>$str</span>, <span>$size</span><span> );
</span><span>21</span>         <span>return</span> <span>strtoupper</span>( <span>bin2hex</span>( mcrypt_cbc(MCRYPT_DES, <span>$this</span>-><span>key</span>, <span>$str</span>, MCRYPT_ENCRYPT, <span>$this</span>-><span>iv ) ) );
</span><span>22</span> <span>    }
</span><span>23</span>     
<span>24</span>     <span>function</span> decrypt(<span>$str</span><span>) {
</span><span>25</span>     <span>//</span><span>解密</span>
<span>26</span>         <span>$strBin</span> = <span>$this</span>->hex2bin( <span>strtolower</span>( <span>$str</span><span> ) );
</span><span>27</span>         <span>$str</span> = mcrypt_cbc( MCRYPT_DES, <span>$this</span>-><span>key</span>, <span>$strBin</span>, MCRYPT_DECRYPT, <span>$this</span>-><span>iv );
</span><span>28</span>         <span>$str</span> = <span>$this</span>->pkcs5Unpad( <span>$str</span><span> );
</span><span>29</span>         <span>return</span> <span>$str</span><span>;
</span><span>30</span> <span>    }
</span><span>31</span>     
<span>32</span>     <span>function</span> hex2bin(<span>$hexData</span><span>) {
</span><span>33</span>         <span>$binData</span> = ""<span>;
</span><span>34</span>         <span>for</span>(<span>$i</span> = 0; <span>$i</span> strlen ( <span>$hexData</span> ); <span>$i</span> += 2<span>) {
</span><span>35</span>             <span>$binData</span> .= <span>chr</span> ( <span>hexdec</span> ( <span>substr</span> ( <span>$hexData</span>, <span>$i</span>, 2<span> ) ) );
</span><span>36</span> <span>        }
</span><span>37</span>         <span>return</span> <span>$binData</span><span>;
</span><span>38</span> <span>    }
</span><span>39</span> 
<span>40</span>     <span>function</span> pkcs5Pad(<span>$text</span>, <span>$blocksize</span><span>) {
</span><span>41</span>         <span>$pad</span> = <span>$blocksize</span> - (<span>strlen</span> ( <span>$text</span> ) % <span>$blocksize</span><span>);
</span><span>42</span>         <span>return</span> <span>$text</span> . <span>str_repeat</span> ( <span>chr</span> ( <span>$pad</span> ), <span>$pad</span><span> );
</span><span>43</span> <span>    }
</span><span>44</span>     
<span>45</span>     <span>function</span> pkcs5Unpad(<span>$text</span><span>) {
</span><span>46</span>         <span>$pad</span> = <span>ord</span> ( <span>$text</span> {<span>strlen</span> ( <span>$text</span> ) - 1<span>} );
</span><span>47</span>         <span>if</span> (<span>$pad</span> > <span>strlen</span> ( <span>$text</span><span> ))
</span><span>48</span>             <span>return</span> <span>false</span><span>;
</span><span>49</span>         <span>if</span> (<span>strspn</span> ( <span>$text</span>, <span>chr</span> ( <span>$pad</span> ), <span>strlen</span> ( <span>$text</span> ) - <span>$pad</span> ) != <span>$pad</span><span>)
</span><span>50</span>             <span>return</span> <span>false</span><span>;
</span><span>51</span>         <span>return</span> <span>substr</span> ( <span>$text</span>, 0, - 1 * <span>$pad</span><span> );
</span><span>52</span> <span>    }    
</span><span>53</span> }

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再来看Session_User

编写php拓展实例

<span>  1</span> <span>php
</span><span>  2</span> <span>define</span> ('BACK_AUTH_NAME','xxxx'); <span>//</span><span>用到的cookie名</span>
<span>  3</span> <span>class</span><span> Session_User { 
</span><span>  4</span>     <span>static</span> <span>$obj</span><span>;
</span><span>  5</span>     <span>private</span> <span>$uid</span><span>;
</span><span>  6</span>     <span>private</span> <span>$username</span><span>;
</span><span>  7</span>     <span>private</span> <span>$chineseName</span><span>;
</span><span>  8</span>     <span>public</span> <span>$auth_name</span> =<span> BACK_AUTH_NAME;
</span><span>  9</span>     <span>private</span> <span>$login_url</span> = <span>null</span><span>;
</span><span> 10</span>     <span>public</span> <span>$domain</span> = <span>null</span><span>;
</span><span> 11</span>     
<span> 12</span>     <span>private</span> <span>function</span>  __construct(<span>$login_url</span> = <span>null</span>, <span>$domain</span> = <span>null</span><span>){
</span><span> 13</span>         <span>$host</span> = <span>$_SERVER</span>["HTTP_HOST"<span>];
</span><span> 14</span>         <span>if</span> (!<span>$login_url</span><span>) {
</span><span> 15</span>             <span>$this</span>->login_url = "http://{<span>$host</span>}/login"<span>;
</span><span> 16</span> <span>        }
</span><span> 17</span>         <span>else</span><span> {
</span><span> 18</span>             <span>$this</span>->login_url = <span>$login_url</span><span>;
</span><span> 19</span> <span>        }
</span><span> 20</span>         
<span> 21</span>         <span>if</span> (!<span>$domain</span><span>) {
</span><span> 22</span>             <span>$domain</span> = <span>$_SERVER</span>["SERVER_NAME"<span>];
</span><span> 23</span>             <span>$this</span>->domain = <span>$domain</span><span>;
</span><span> 24</span> <span>        }
</span><span> 25</span>         
<span> 26</span>         <span>if</span> (<span>empty</span> ( <span>$_COOKIE</span> [<span>$this</span>-><span>auth_name] )) {
</span><span> 27</span>             <span>return</span><span>;
</span><span> 28</span> <span>        }
</span><span> 29</span>         
<span> 30</span>         <span>list</span> ( <span>$uid</span>, <span>$username</span>, <span>$ua</span>, <span>$tm</span>, <span>$chineseName</span> ) = @<span>$this</span>->decodeAuth (<span>$_COOKIE</span> [<span>$this</span>-><span>auth_name]);
</span><span> 31</span> 
<span> 32</span>         
<span> 33</span>         <span>//</span><span>ua检验</span>
<span> 34</span>         <span>if</span> (<span>empty</span> ( <span>$uid</span> ) || <span>$ua</span> !== <span>md5</span>(<span>$_SERVER</span> ['HTTP_USER_AGENT'<span>])) {
</span><span> 35</span>             <span>return</span><span>;
</span><span> 36</span> <span>        }
</span><span> 37</span> 
<span> 38</span>         <span>//</span><span>TODO:过期时间检验</span>
<span> 39</span>         
<span> 40</span>         <span>$this</span>->uid = <span>$uid</span><span>;
</span><span> 41</span>         <span>$this</span>->username = <span>$username</span><span>;
</span><span> 42</span>         <span>$this</span>->chineseName = <span>$chineseName</span><span>;
</span><span> 43</span> <span>    }
</span><span> 44</span>     
<span> 45</span>     <span>static</span> <span>public</span> <span>function</span> instance(<span>$login_url</span> = <span>null</span>, <span>$domain</span> = <span>null</span><span>){
</span><span> 46</span>         <span>if</span>(self::<span>$obj</span><span>)
</span><span> 47</span>             <span>return</span> self::<span>$obj</span><span>;
</span><span> 48</span>         <span>else</span><span>{
</span><span> 49</span>             self::<span>$obj</span> = <span>new</span> Session_User(<span>$login_url</span>, <span>$domain</span><span>);
</span><span> 50</span> <span>        }
</span><span> 51</span>         <span>return</span> self::<span>$obj</span><span>;
</span><span> 52</span> <span>    }
</span><span> 53</span> 
<span> 54</span>     
<span> 55</span>     <span>/*</span><span>*
</span><span> 56</span> <span>     * 用户是否登陆
</span><span> 57</span> <span>     * </span><span>*/</span>
<span> 58</span>     <span>public</span> <span>function</span><span> isLogin(){
</span><span> 59</span>         <span>if</span>(! <span>empty</span>(<span>$this</span>-><span>uid))
</span><span> 60</span>             <span>return</span> <span>true</span><span>; 
</span><span> 61</span>         <span>else</span>
<span> 62</span>             <span>return</span> <span>false</span><span>;
</span><span> 63</span> <span>    }
</span><span> 64</span>     <span>/*</span><span>*
</span><span> 65</span> <span>     * 
</span><span> 66</span> <span>     * 跳转到登录页面
</span><span> 67</span> <span>     * @param unknown_type $forward
</span><span> 68</span> <span>     * @param unknown_type $exit
</span><span> 69</span>      <span>*/</span>
<span> 70</span>     <span>public</span> <span>function</span> requireLogin(<span>$forward</span> = '', <span>$exit</span> = <span>true</span><span>){
</span><span> 71</span>         <span>if</span>(! <span>$this</span>-><span>isLogin()){
</span><span> 72</span>             <span>if</span>(<span>$forward</span> === <span>null</span><span>)
</span><span> 73</span> <span>            {
</span><span> 74</span>                 <span>header</span>("location: " . <span>$this</span>-><span>login_url);
</span><span> 75</span>                 
<span> 76</span> <span>            }
</span><span> 77</span>             <span>else</span>
<span> 78</span> <span>            {
</span><span> 79</span>                 <span>if</span>(<span>empty</span>(<span>$forward</span><span>))
</span><span> 80</span> <span>                {
</span><span> 81</span>                     <span>$forward</span> = 'http://'.<span>$_SERVER</span>['HTTP_HOST'].<span>$_SERVER</span>['REQUEST_URI'<span>];
</span><span> 82</span> <span>                }
</span><span> 83</span>                 <span>$forward</span> = <span>urlencode</span>(<span>$forward</span><span>);
</span><span> 84</span>                 <span>header</span>("location: ". <span>$this</span>->login_url . "?forward=<span>$forward</span>"<span>);
</span><span> 85</span> <span>            }
</span><span> 86</span>             <span>if</span>(<span>$exit</span><span>)
</span><span> 87</span>                 <span>exit</span><span>;
</span><span> 88</span> <span>        }
</span><span> 89</span> <span>    }
</span><span> 90</span>     <span>/*</span><span>*
</span><span> 91</span> <span>     * 
</span><span> 92</span> <span>     *设置登录状态
</span><span> 93</span> <span>     * @param unknown_type $uid
</span><span> 94</span> <span>     * @param unknown_type $username
</span><span> 95</span> <span>     * @param unknown_type $ua
</span><span> 96</span> <span>     * @param unknown_type $outtime
</span><span> 97</span>      <span>*/</span>
<span> 98</span>     
<span> 99</span>     <span>public</span> <span>function</span> setLogin(<span>$uid</span>, <span>$username</span>, <span>$ua</span> = <span>null</span>,<span>$outtime</span> = <span>null</span>, <span>$chineseName</span> = <span>null</span><span>){
</span><span>100</span>         <span>if</span>(<span>empty</span>(<span>$ua</span><span>)){
</span><span>101</span>             <span>$ua</span> = <span>$_SERVER</span>['HTTP_USER_AGENT'<span>];
</span><span>102</span> <span>        }
</span><span>103</span>         
<span>104</span>         <span>$str</span> = <span>$this</span>->encodeAuth(<span>$uid</span>, <span>$username</span>, <span>$ua</span>, <span>$chineseName</span><span>);
</span><span>105</span>         <span>setcookie</span>(<span>$this</span>->auth_name,<span>urlencode</span>(<span>$str</span>),<span>$outtime</span>,'/',<span>$this</span>-><span>domain);
</span><span>106</span> <span>    }
</span><span>107</span>     <span>/*</span><span>*
</span><span>108</span> <span>     * 用户退出
</span><span>109</span>       <span>*/</span>
<span>110</span>     <span>public</span> <span>function</span><span> setLogout(){
</span><span>111</span>         <span>setcookie</span>(<span>$this</span>->auth_name,'',-1,'/',<span>$this</span>-><span>domain);
</span><span>112</span> <span>    }
</span><span>113</span>     
<span>114</span>     <span>public</span> <span>function</span> __get(<span>$key</span><span>){
</span><span>115</span>         <span>if</span>('uid' == <span>$key</span><span>){
</span><span>116</span>             <span>return</span> <span>$this</span>-><span>uid;
</span><span>117</span>         }<span>elseif</span> ('username' == <span>$key</span><span>) {
</span><span>118</span>             <span>return</span> <span>$this</span>-><span>username;
</span><span>119</span>         }<span>elseif</span> ('chineseName' == <span>$key</span><span>) {
</span><span>120</span>             <span>return</span> <span>$this</span>-><span>chineseName;
</span><span>121</span> <span>        }
</span><span>122</span>         <span>return</span><span> ;
</span><span>123</span> <span>    }
</span><span>124</span>     
<span>125</span>     <span>public</span>  <span>function</span><span> getUid(){
</span><span>126</span>         <span>return</span> <span>$this</span>-><span>uid;
</span><span>127</span> <span>    }    
</span><span>128</span>     
<span>129</span>     <span>public</span> <span>function</span><span> getUserName(){
</span><span>130</span>         <span>return</span> <span>$this</span>-><span>username;
</span><span>131</span> <span>    }    
</span><span>132</span>     
<span>133</span>     <span>public</span> <span>function</span><span> getChineseName(){
</span><span>134</span>         <span>return</span> <span>$this</span>-><span>chineseName;
</span><span>135</span> <span>    }
</span><span>136</span> 
<span>137</span>     <span>/*</span><span>*
</span><span>138</span> <span>     * 生成加密的登陆cookie
</span><span>139</span>      <span>*/</span>
<span>140</span>     <span>private</span> <span>function</span>  encodeAuth(<span>$uid</span>,<span>$username</span>,<span>$ua</span>,<span>$chineseName</span>=<span>null</span><span>){
</span><span>141</span>         <span>$tm</span> = <span>time</span><span>();
</span><span>142</span>         <span>$ua</span> = <span>md5</span>(<span>$ua</span><span>);
</span><span>143</span>         <span>$info</span> = "<span>$uid</span>\t<span>$username</span>\t<span>$ua</span>\t<span>$tm</span>\t<span>$chineseName</span>"<span>;
</span><span>144</span>         <span>$des</span> = <span>new</span><span> Session_DES();
</span><span>145</span>         <span>$str</span> = <span>$des</span>->encrypt(<span>$info</span><span>);
</span><span>146</span>         <span>return</span> <span>$str</span><span>;
</span><span>147</span> <span>    }
</span><span>148</span> 
<span>149</span>     <span>/*</span><span>*
</span><span>150</span> <span>     * 解析加密cookie 
</span><span>151</span>      <span>*/</span>
<span>152</span>     <span>private</span> <span>function</span> decodeAuth(<span>$str</span><span>){
</span><span>153</span>         <span>$des</span> = <span>new</span><span> Session_DES();
</span><span>154</span>         <span>$info</span> = <span>explode</span>("\t",@<span>$des</span>->decrypt(<span>$str</span><span>));
</span><span>155</span>         <span>if</span>(<span>is_array</span>(<span>$info</span><span>)){
</span><span>156</span>             <span>return</span> <span>$info</span><span>;
</span><span>157</span>         }<span>else</span><span>{
</span><span>158</span>             <span>return</span> <span>array</span><span>();
</span><span>159</span> <span>        }
</span><span>160</span> <span>    }
</span><span>161</span>     
<span>162</span>     <span>public</span> <span>function</span> auth(<span>$controller</span>,<span>$action</span><span>)
</span><span>163</span> <span>    {
</span><span>164</span>         <span>if</span>(!<span>in_array</span>(<span>$controller</span>,<span>$conArr</span><span>)){
</span><span>165</span>             <span>return</span> <span>false</span><span>;
</span><span>166</span> <span>        }
</span><span>167</span>         <span>if</span>(!<span>in_array</span>(<span>$action</span>,<span>$actArr</span><span>)){
</span><span>168</span>             <span>return</span> <span>false</span><span>;
</span><span>169</span> <span>        }
</span><span>170</span>         <span>return</span> <span>true</span><span>;
</span><span>171</span> <span>    }
</span><span>172</span> }

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View Code

结合上面两段代码，分离出来其实得到的会话类（常常做的就是把一样的的跟不一样的分离出来），只需要3个变量两个是des用到的iv偏移量，key加密秘钥，跟cookie名，然后我们就可以写我们的拓展了，其中踩到了很多坑，一些makefile，config.w4等小语法，lib依赖，总之还是学到了很多

代码地址：https://github.com/lietdai/ldclass