after the php version was switched from 5.x to PHP7.x, phpmyadmin prompted "missing mcrypt extension." Please check the PHP configuration. "
under windows, the phpstudy environment is used
after the php version was switched from 5.x to PHP7.x, phpmyadmin prompted "missing mcrypt extension." Please check the PHP configuration. "
under windows, the phpstudy environment is used
 because your php7 does not have an extension installed: 
 take php7.0 as an example: 
 sudo apt-get update 
 sudo apt-get install mcrypt php7.0-mcrypt 
 sudo apt-get upgrade 
 if it is apache 
 sudo service apache2 restart 
then check whether the installation is successful:
php-m
find mcrypt
done!
windows, it is estimated that it is removed directly from php.ini; it is OK
.if compiled:
 tar zxvf mcrypt-2.6.8.tar.gz / / Note the version number 
 cd mcrypt-2.6.8 
 LD_LIBRARY_PATH=/usr/local/lib. / configure 
 make 
 make install 
PHP compilation added-- with-mcrypt
phpstudy, different php versions have different PHP directory files, so the file name can tell which version it belongs to. Enter the PHP file directory of the corresponding version, open php.ini and open the corresponding extension, and check whether there is any corresponding extension in the extend extension directory under the current directory. You can download
of window version and linux version of pecl.php.net without downloading it.the above members have made it very clear under linux
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