微信开发模式教程 php

<?php
$access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
$response = file_get_contents($access_token_url);
$result = json_decode($response, true);

if (isset($result['access_token'])) {
    $access_token = $result['access_token'];
    // 使用access_token进行后续操作
} else {
    echo "获取access_token失败: " . $result['errmsg'];
}
?>

<?php
function createNonceStr($length = 16) {
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    $str = "";
    for ($i = 0; $i < $length; $i++) {
        $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;
}

function createSign($data, $key) {
    ksort($data);
    $stringA = "";
    foreach ($data as $key => $value) {
        if (!$value) continue;
        $stringA .= "&" . $key . "=" . $value;
    }
    $stringSignTemp = $stringA . "&key=" . $key;
    return strtoupper(md5($stringSignTemp));
}

$data = [
    'appid' => 'APPID',
    'mch_id' => 'MCH_ID',
    'nonce_str' => createNonceStr(),
    'body' => '商品描述',
    'out_trade_no' => '商户订单号',
    'total_fee' => '订单总金额',
    'spbill_create_ip' => '客户端IP地址',
    'notify_url' => '通知地址',
    'trade_type' => 'NATIVE'
];
$key = 'API_KEY';
$data['sign'] = createSign($data, $key);
?>