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<!DOCTYPE html> <html> <body> <?php // 一个无效的 JSON 字符串 $string = "{'Bill':35,'Elon':37,'Steve':43}"; echo "正在解码：" . $string; json_decode($string); echo "<br>错误："; switch (json_last_error()) { case JSON_ERROR_NONE: echo "没有错误"; break; case JSON_ERROR_DEPTH: echo "超出最大堆栈深度"; break; case JSON_ERROR_STATE_MISMATCH: echo "无效或格式错误的JSON"; break; case JSON_ERROR_CTRL_CHAR: echo "控制字符错误"; break; case JSON_ERROR_SYNTAX: echo "语法错误"; break; case JSON_ERROR_UTF8: echo "UTF-8字符格式错误"; break; default: echo "未知错误"; break; } ?> </body> </html>