Some PHP tips and precautions Analysis

From the browser, the use of header (location) to jump to another page, but in fact, PHP will still execute the background code, if the following code has unsafe logic, then directly disregard the conditions set by the developer, continue to carry out the things behind.
Such as:
Copy Code code as follows:
if (true)
{
Header (' location:http://www.jb51.net ');
}
File_put_contents (' test.txt ', ' OK ');

In this code, a careless programmer would assume the header (' location:http://www.jb51.net '); Over, in fact, the background code is still executed, so use header (location), whether encapsulated in another function or directly written, are recommended to add exit () Confirmation program aborted.
====soap
Today ran a demo code, there was "Class ' soapclient ' not found" error. Search for a bit, need to start the SOAP service, but in the php.ini Windows extensions found no Soap.dll, initially thought my PHP version does not include this DLL, to the PHP installation directory under the EXT subdirectory looked at, found that Php_ The Soap.dll is there. That's easy, just add Extension=php_soap.dll to the Windows Extensions section and restart Apache.
SSL default is also not started, Extension=php_openssl.dll, you can put it in front of ";" Just get rid of it.
Copy Code code as follows:
Var_dump ($query);//print out the result as text view
$GLOBALS//Save All global variables (only on the current page)
Get_defined_vars ()//Returns an array of all defined variables (including global variables, super global variables, etc.)
Get_defined_constants ()//Returns an array of all defined constants