文档介绍：PHP 调试技术手册
目录
1 内置 API 输出调试.................................................................................................................................... 2
基本调试 API ............................................................................................................................................... 2
echo (print): ......................................................................................................................................... 2
printf .................................................................................................................................................... 2
print_r、var_dump(var_export)、debug_zval_dump......................................................................... 3
错误控制和日志记录调试........................................................................................................................... 6
错误选项控制.................................................................................................................................... 6
错误抛出和处理................................................................................................................................ 8
使用错误抑制符...............................................................................................................................11
日志记录...........................................................................................................................................11
2 浏览器调试............................................................................................................................................... 13
页面输出调试............................................................................................................................................. 13
FirePHP 调试.............................................................................................................................................. 14
普通变量监测......