Several solutions to php:undefined index

Usually use $_post['],$_get['] to get the parameters in the form will appear Notice: Undefined index:--------;

Although it is possible to hide this hint by setting the error display, there is a hidden danger that these prompts are logged in the server's log, causing the log file to be unusually large.

Through on-line search and their own actual combat to summarize several solutions;

Method 1: Server configuration Modifications
Modify the php.ini configuration file, error_reporting = E_all & ~e_notice

Method 2: Initialize the variable.

Method 3: Make a judgment Isset ($_post["]), Empty ($_post[")) if--else

Method 4: Add @,@ before the notice code to indicate that the line has errors or warnings do not output, @ $username =$_post[' username '];

Method 5: The last one is very practical, is a function written by others, through this function to pass the value.

Define a function:

function _get ($str) {    $val =!  Empty($_get[$str])? $_get[$STR]: null;    return $val;}

Then use _get (' str ') instead of $_get[' str ').

Several solutions to php:undefined index