PHP executes external commands with backtick_PHP tutorial

PHP uses backticks to execute external commands

For example:

echo `whoami`;

// Export the database, the folder to be imported must have writable permissions, and the content after -u -p must be written immediately

The code is as follows:

echo `mysqldump -h localhost -u$DbUser -p$DbPwd --default-character-set=utf8 $DbName > /var/$dumpFileName`;

Other uses of backticks

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#使用反撇号，暗示作为命令来执行 $result=`date`; echo " the server timestamp is: $result ";   echo " "; #使用shell_exec() $result1=shell_exec("date"); echo " the server timestamp is: $result1 "; ?>

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#Use a backtick to imply execution as a command $result=`date`;

echo "

the server timestamp is: $result

"; echo "

---

"; #Use shell_exec() $result1=shell_exec("date"); echo "

the server timestamp is: $result1

"; ?>

The output results are as follows: the server timestamp is: Current date: 2009/06/30 Enter the new date: (year, month, day) http://www.bkjia.com/PHPjc/983322.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/983322.htmlTechArticlePHP uses backticks to execute external commands. For example: echo `whoami`; // Export database, file to be imported The folder must have writable permissions, and the content after -u -p must be written next to the code as follows...