UC知道PHP mysql 连接错误
来源：百度知道 编辑：UC知道 时间：2024/05/17 22:11:55
A PHP Error was encountered
Severity: Warning
Message: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at H:\PHP\xampp\htdocs\application\config\config.php:1)
Filename: config/settings.php
Line Number: 36
A PHP Error was encountered
Severity: Warning
Message: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at H:\PHP\xampp\htdocs\application\config\config.php:1)
Filename: config/settings.php
Line Number: 36
A PHP Error was encountered
Severity: Warning
Message: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at H:\PHP\xampp\htdocs\application\config\config.php:1)
Filename: controllers/register.php
Severity: Warning
Message: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at H:\PHP\xampp\htdocs\application\config\config.php:1)
Filename: config/settings.php
Line Number: 36
A PHP Error was encountered
Severity: Warning
Message: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at H:\PHP\xampp\htdocs\application\config\config.php:1)
Filename: config/settings.php
Line Number: 36
A PHP Error was encountered
Severity: Warning
Message: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at H:\PHP\xampp\htdocs\application\config\config.php:1)
Filename: controllers/register.php
session_start() 必须放在程序第一行 <?php后
session_start()前不能有任何输出，空格也不行，所以你好好检查下看前面有没有空格或其他输出
注意一下文件的编码。UTF-8 编码的话。文件头会有一个标记的。那个标记在编辑器里不可见。但它会被做为输出存在。
查看方法。用记事本打开PHP文件。然后文件另存为。。下面选项就有编码格式。
config.php文件最顶上一行有空格 或者包含文件中有空格