Fatal error Call to undefined function mcrypt encrypt

Question

NOTE  The libraries MCrypt support depend on have not been updated in years and MCrypt should no longer be considered a viable or secure method of encrypting data   What s more  MCrypt has been deprecated in PHP 5  and removed entirely in PHP 7   If you have any code that runs MCrypt you should refactor it to use a more modern encryption library       Does anyone know why this error message   Call to undefined function mcrypt encrypt     displays when I run the following code below   Am I missing some steps perhaps any setting in PHP I have to do before this code can work    key    password to  en de crypt    string    string to be encrypted     test   mcrypt encrypt MCRYPT RIJNDAEL 256  md5  key                string  MCRYPT MODE CBC  md5 md5  key

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On Linux Mint 17 1 Rebecca - Call to undefined function mcrypt create iv     Solved by adding the following line to the php ini  extension mcrypt so   After that a   service apache2 restart   solved it

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For me it helped to uninstall mcrypt with   sudo apt-get purge php5-mcrypt   and simply reinstall it   sudo apt-get install php5-mcrypt   and dont forget to restart apache as described above   Dont know why and how this was different in my case   using a vm with provisioned php55   but maybe this will help someone else  I also had this problem with some other modules like xcache

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If you are using PHP 7 2 or up      This function was DEPRECATED in PHP 7 1 0  and REMOVED in PHP 7 2 0    source  http   php net manual en function mcrypt-encrypt php  So you have to replace the php code and find a solution without mcrypt   Or  I just found out  you can STILL use mcrypt in PHP 7 2 0  but you have to install it as a PHP Extension Community Library   https   pecl php net     On Debian Ubuntu Linux distros   sudo apt-get -y install gcc make autoconf libc-dev pkg-config sudo apt-get -y install php7 2-dev sudo apt-get -y install libmcrypt-dev   then   sudo pecl install mcrypt-1 0 1   Source  https   www techrepublic com article how-to-install-mcrypt-for-php-7-2

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Is mcrypt enabled  You can use phpinfo   to see if it is

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You don t have the mcrypt library installed   See http   www php net manual en mcrypt setup php for more information   If you are on shared hosting  you can ask your provider to install it     In OSX you can easily install mcrypt via homebrew  brew install php54-mcrypt --without-homebrew-php   Then add this line to  etc php ini   extension   usr local Cellar php54-mcrypt 5 4 24 mcrypt so

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I had the same issue for PHP 7 version of missing mcrypt   This worked for me    sudo apt-get update sudo apt-get install mcrypt php7 0-mcrypt sudo apt-get upgrade sudo service apache2 restart  if needed

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Check and install php5-mcrypt   sudo apt-get install php5-mcrypt

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What had worked for me with PHP version 5 2 8  was to open up php ini and allow the php mcrypt dll extension by removing the    i e  changing    extension php mcrypt dll  to extension php mcrypt dll

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In Ubuntu 18 04  and for php7 0    sudo apt-get install php7 0-mcrypt    sudo systemctl reload apache2

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Assuming you are using debian linux  I m using Linux mint 12  problem was on Ubuntu 12 04 1 LTS server I ssh ed into    I suggest taking  dkamins advice and making sure you have mcrypt installed and active on your php5 install   Use  sudo apt-get install php5-mcrypt  to install   My notes below   Using PHP version PHP Version 5 3 10-1ubuntu3 4  if you open phpinfo   as suggested by  John Conde  which you do by creating test file on web server  e g  create status page testphp php with just the contents    anywhere accessible on the server via browser   I found no presence of enabled or disabled status on the status page when opened in browser   When I then opened the php ini file  mentioned by  Anthony Forloney  thinking to uncomment  extension php mcrypt dll to extension php mcrypt dll  I toggled that back and forth and restarted Apache  I m running Apache2 and you can restart in my setup with sudo  etc init d apache2 restart or when you are in that directory just sudo restart I believe   with change and without change but all no go   I took  dkamins advice and went to install the package with  sudo apt-get install php5-mcrypt  and then restarted apache as above   Then my error was gone and my application worked fine

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For windows   extension php mcrypt dll to extension php mcrypt dll   then restart your apache server   For Redhat  sudo yum install php55-mcrypt   if php5 5 sudo yum install php-mcrypt   if less than 5 4 sudo service httpd restart   if apache 2 4 sudo  etc init d httpd restart   if apache 2 2 or less   For Ubuntu  sudo apt-get install php5-mcrypt sudo service apache2 restart   if server not reloaded automatically    Still not working      sudo php5enmod mcrypt  amp  amp  sudo service apache2 restart

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for Linux based  Fedora   yum -y install php-mcrypt   Enable the module by adding   extension mcrypt so  to PHP ini    etc php ini   systemctl restart httpd service   Done

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If you are using php5-fpm do remeber to restart it  after installing mcrypt  service php5-fpm restart

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Under Ubuntu I had the problem and solved it with    sudo apt-get install php5-mcrypt   sudo service apache2 reload

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My Environment  Windows 10  Xampp Control Panel v3 2 4  PHP 7 3 2  Step-1  Download a suitable version for your system from here  https   pecl php net package mcrypt 1 0 3 windows  Step-2  Unzip and copy php mcrypt dll file to    xampp php ext    Step-3  Open    xampp php php ini file and add a line extension php mcrypt dll  Step-4  Restart apache  DONE

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One more thing  if you are serving PHP via a web server such as Apache  try restarting the web server  This will  reset  any PHP modules that might be present  activating the new configuration

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On ubuntu 14 10    Install module mcrypt  sudo apt install php5-mcrypt   Enable module mcrypt on apache2  sudo a2enmod mcrypt   Reload module configuration  sudo service apache2 restart

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If you using ubuntu 14 04 here is the fix to this problem   First check php5-mcryp is already installed apt-get install php5-mcrypt  If installed  just run this two command or install and run this two command    sudo php5enmod mcrypt   sudo service apache2 restart   I hope it will work

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If you have recently updated to ubuntu 14 04 here is the fix to this problem     sudo mv  etc php5 conf d mcrypt ini  etc php5 mods-available    sudo php5enmod mcrypt   sudo service apache2 restart

[php] Fatal error: Call to undefined function mcrypt_encrypt()

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