PHP executes external commands with anti-apostrophe, PHP executes external commands _php tutorial

PHP executes external commands with anti-apostrophe, PHP executes external commands

For example:

Echo ' WhoAmI ';

Export the database, the folder to be imported must have writable permission, the content after-u-p must be written next to each other

Copy the code as follows: Echo ' mysqldump-h localhost-u$dbuser-p$dbpwd--default-character-set=utf8 $DbName >/var/$ Dumpfilename ';

Other uses of anti-apostrophe

<?php    #使用反撇号, implied as a command to execute  $result = ' Date ';  echo "
The server timestamp is: $result
";  echo "
 
  ";  #使用shell_exec ()  $result 1=shell_exec ("date");  echo "
The server timestamp is: $result 1
";? >

The output results are as follows:
The server timestamp is: current date: 2009/06/30 Second Enter new date: (Year month day)

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