Keredari - Developer's Blog

The main reason behind this error in WordPress is more straightforward than it might seem. We can not know it, but WordPress has restrictions on the some types of files we can upload. The error "Sorry, this file type is not permitted for security reasons."  appears when we try to upload a prohibited file type like .svg, .svgz, .docs etc. We can fix this issue using following methods: 1. Modify file types using a Plugin: There are several plugins capable of enabling you to upload prohibited file types, such as File Manager and Enhanced Media Library . 2. Use the upload_mimes filter by editing theme's functions.php file and paste below code: function av_custom_mime_types( $mimes ) { // Add new new allowed mime types $mimes['doc'] = 'application/msword'; $mimes['svg'] = 'image/svg+xml'; $mimes['svgz'] = 'image/svg+xml'; // You can remove any particular mime type (Optional) unset( $mimes['exe'] );

Show loader image and disable page or div section while waiting for ajax request. Use below example code: HTML <!-- Image loader --> <div id="loader" class="ajax_loader" style="display: none;">   <img src="images/ajax-loader.gif" width="32px" height="32px" /> </div> JS $.ajax({ type: 'POST', url: 'URL', dataType: 'json', data: user, beforeSend: function(){ $("#loader").show(); },success:function(response){ //Put your logic after success }, complete:function(data){ $("#loader").hide(); } }); Note: Include jquery.js before use above js CSS <style> .ajax_loader{ position:absolute; width:100%; height:100%; left:0; top:0; background:rgba(0,0,0,.5);} .ajax_loader img{ position:absolute; left:50%; top:50%;} </style>

When you execute a query having GROUP BY against a database in MySQL you could have encountered the error "this is incompatible with sql_mode=only_full_group_by” in MySQL". Below are the steps to fix the issue. 1. Edit MySQL configuration sudo nano /etc/mysql/conf.d/mysql.cnf 2. Append below code and save and exit [mysqld] sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION 3. Restart MySQL server sudo service mysql restart