PHP using anti-apostrophe to execute external commands _php tutorial

PHP executes external commands with anti-apostrophe

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

The code is as follows:

Echo ' mysqldump-h localhost-u$dbuser-p$dbpwd--default-character-set=utf8 $DbName >/var/$dumpFileName ';

Other uses of anti-apostrophe

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#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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