最近项目中用到了微信支付，于是找到了这篇资料，为了防止遗忘转载一下，先谢过作者。原文地址：http://www.360us.net/article/22.html
最近把支付宝、银联和微信支付全都做了一遍，目前做的都还只涉及到消费的功能。
做下来感觉就是各个平台的支付流程都是大同小异，签名方式也是一样的。
这里主要总结一下微信支付公众号支付的一些东西。
微信公众号支付的主要流程如下：
1、生成我们自己系统的订单。
2、调用微信支付的统一下单接口把订单信息推给微信。
3、在第二部会返回一个预支付会话标识，然后凭这个标识用JS去调用支付操作。
关于支付页面的url问题，微信要求是最后必须要有“/”，我看到很多文章说不适合MVC结构的程序，我的情况是否定的，MVC结构一样可以。<br>比如url是这个：<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>http://www.example.com/payment/wechatpay/ ,url里面<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>payment是<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>controller,<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>wechatpay是<codecourier new font-size:12.6000003814697px padding:2px color:rgb background-color:rgb>action，这有问题吗？<br>一样可以访问，可以支付，是不是一个真正的目录，在微信看来就是，实际上其实不是。<phelvetica neue grande sans gb yahei micro hei font-size:14px line-height:20px><br><phelvetica neue grande sans gb yahei micro hei font-size:14px line-height:20px>好，下面进入正题。<br><phelvetica neue grande sans gb yahei micro hei font-size:14px line-height:20px><br>微信支付配置如下：<table border="0" cellpadding="0" cellspacing="0" courier new width:803px word-break:break-all color:rgb border:1px solid rgb bottom:auto float:none left:auto line-height:1.1em margin:0.3em outline:0px overflow:auto padding:0px position:relative right:auto top:auto vertical-align:baseline min-height:inherit font-size:13px background:none><tbody><tr>
<td>
<p>1</p>
<p>2</p>
<p>3</p>
<p>4</p>
<p>5</p>
</td>
<tdcourier new width:766px padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline min-height:inherit font-size:13px background:none><p></p>
<p><codecourier new padding:0px color:rgb border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>$config <codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>= [</codecourier></codecourier></p>
<p><codecourier new color:rgb padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'mch_id' <codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>=> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'1234455666'<codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>, <codecourier new padding:0px color:rgb border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>//商户号</codecourier></codecourier></codecourier></codecourier></codecourier></codecourier></p>
<p><codecourier new color:rgb padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'signType' <codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>=> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'MD5'<codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>, <codecourier new padding:0px color:rgb border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>//签名方式，目前只有MD5</codecourier></codecourier></codecourier></codecourier></codecourier></codecourier></p>
<p><codecourier new color:rgb padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'key' <codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>=> <codecourier new padding:0px color:blue border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>'sdsfdhgjh34343krn3453tnelt'<codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>, <codecourier new padding:0px color:rgb border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>//api密钥</codecourier></codecourier></codecourier></codecourier></codecourier></codecourier></p>
<p><codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none>];</codecourier></p></tdcourier>
</tr></tbody></table><phelvetica neue grande sans gb yahei micro hei font-size:14px line-height:20px>Weixinpay代码清单如下：<table border="0" cellpadding="0" cellspacing="0" courier new width:803px word-break:break-all color:rgb border:1px solid rgb bottom:auto float:none left:auto line-height:1.1em margin:0.3em outline:0px overflow:auto padding:0px position:relative right:auto top:auto vertical-align:baseline min-height:inherit font-size:13px background:none><tbody><tr>
<td>
<p>1</p>
<p>2</p>
<p>3</p>
<p>4</p>
<p>5</p>
<p>6</p>
<p>7</p>
<p>8</p>
<p>9</p>
<p>10</p>
<p>11</p>
<p>12</p>
<p>13</p>
<p>14</p>
<p>15</p>
<p>16</p>
<p>17</p>
<p>18</p>
<p>19</p>
<p>20</p>
<p>21</p>
<p>22</p>
<p>23</p>
<p>24</p>
<p>25</p>
<p>26</p>
<p>27</p>
<p>28</p>
<p>29</p>
<p>30</p>
<p>31</p>
<p>32</p>
<p>33</p>
<p>34</p>
<p>35</p>
<p>36</p>
<p>37</p>
<p>38</p>
<p>39</p>
<p>40</p>
<p>41</p>
<p>42</p>
<p>43</p>
<p>44</p>
<p>45</p>
<p>46</p>
<p>47</p>
<p>48</p>
<p>49</p>
<p>50</p>
<p>51</p>
<p>52</p>
<p>53</p>
<p>54</p>
<p>55</p>
<p>56</p>
<p>57</p>
<p>58</p>
<p>59</p>
<p>60</p>
<p>61</p>
<p>62</p>
<p>63</p>
<p>64</p>
<p>65</p>
<p>66</p>
<p>67</p>
<p>68</p>
<p>69</p>
<p>70</p>
<p>71</p>
<p>72</p>
<p>73</p>
<p>74</p>
<p>75</p>
<p>76</p>
<p>77</p>
<p>78</p>
<p>79</p>
<p>80</p>
<p>81</p>
<p>82</p>
<p>83</p>
<p>84</p>
<p>85</p>
<p>86</p>
<p>87</p>
<p>88</p>
<p>89</p>
<p>90</p>
<p>91</p>
<p>92</p>
<p>93</p>
<p>94</p>
<p>95</p>
<p>96</p>
<p>97</p>
<p>98</p>
<p>99</p>
<p>100</p>
<p>101</p>
<p>102</p>
<p>103</p>
<p>104</p>
<p>105</p>
<p>106</p>
<p>107</p>
<p>108</p>
<p>109</p>
<p>110</p>
<p>111</p>
<p>112</p>
<p>113</p>
<p>114</p>
<p>115</p>
<p>116</p>
<p>117</p>
<p>118</p>
<p>119</p>
<p>120</p>
<p>121</p>
<p>122</p>
<p>123</p>
<p>124</p>
<p>125</p>
<p>126</p>
<p>127</p>
<p>128</p>
<p>129</p>
<p>130</p>
<p>131</p>
<p>132</p>
<p>133</p>
<p>134</p>
<p>135</p>
<p>136</p>
<p>137</p>
<p>138</p>
<p>139</p>
<p>140</p>
<p>141</p>
<p>142</p>
<p>143</p>
<p>144</p>
<p>145</p>
<p>146</p>
<p>147</p>
<p>148</p>
<p>149</p>
<p>150</p>
<p>151</p>
<p>152</p>
<p>153</p>
<p>154</p>
<p>155</p>
<p>156</p>
<p>157</p>
<p>158</p>
<p>159</p>
<p>160</p>
<p>161</p>
<p>162</p>
<p>163</p>
<p>164</p>
<p>165</p>
<p>166</p>
<p>167</p>
<p>168</p>
<p>169</p>
<p>170</p>
<p>171</p>
<p>172</p>
<p>173</p>
<p>174</p>
<p>175</p>
<p>176</p>
<p>177</p>
<p>178</p>
<p>179</p>
<p>180</p>
<p>181</p>
<p>182</p>
<p>183</p>
<p>184</p>
<p>185</p>
<p>186</p>
<p>187</p>
<p>188</p>
<p>189</p>
<p>190</p>
<p>191</p>
<p>192</p>
<p>193</p>
<p>194</p>
<p>195</p>
<p>196</p>
<p>197</p>
<p>198</p>
<p>199</p>
<p>200</p>
<p>201</p>
<p>202</p>
<p>203</p>
<p>204</p>
<p>205</p>
<p>206</p>
<p>207</p>
<p>208</p>
<p>209</p>
<p>210</p>
<p>211</p>
<p>212</p>
<p>213</p>
<p>214</p>
<p>215</p>
<p>216</p>
<p>217</p>
<p>218</p>
<p>219</p>
<p>220</p>
<p>221</p>
<p>222</p>
<p>223</p>
<p>224</p>
<p>225</p>
<p>226</p>
<p>227</p>
<p>228</p>
<p>229</p>
<p>230</p>
<p>231</p>
<p>232</p>
<p>233</p>
<p>234</p>
<p>235</p>
<p>236</p>
<p>237</p>
<p>238</p>
<p>239</p>
<p>240</p>
<p>241</p>
<p>242</p>
<p>243</p>
</td>
<tdcourier new width:752px padding:0px border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline min-height:inherit font-size:13px background:none><p></p>
<p><codecourier new padding:0px color:black border:0px bottom:auto float:none left:auto line-height:1.1em margin:0px outline:0px overflow:visible position:static right:auto top:auto vertical-align:baseline width:auto min-height:inherit background:none><?php
namespace weixin\components; //这个是命名空间，可以根据需要修改
class WeixinPay
{
//支付配置
public $config;
//支付参数
public $params;
//统一下单url
const POST_ORDER_URL = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
//订单查询url
const ORDER_QUERY_URL = 'https://api.mch.weixin.qq.com/pay/orderquery';
/**
* 创建微信js发起支付参数
* @return array
*/
public function createJsPayData()
{
$this->params['nonce_str'] = $this->getRandomStr();
$this->params['sign'] = $this->sign();
$xmlStr = $this->arrayToXml();
$res = $this->postUrl(self::POST_ORDER_URL, $xmlStr);
$res = $this->xmlToArray($res);
if( $res['return_code'] == 'SUCCESS' && $res['result_code'] == 'SUCCESS'
