creating custom block in concrete5.7.5.6

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I have found "Class 'BlockController' not found" when I create custom block om my system
how to solve this error please help me and let me know

 
WillemAnchor replied on at Permalink Reply
WillemAnchor
Hi abhinav,

Make sure all your path-, file-, namespace-, and classnames are spelled correctly.
Also check all uppercase and '_' naming conventions.
mesuva replied on at Permalink Reply
mesuva
Have you got a use statement at the top of your block controller that looks like this?
use \Concrete\Core\Block\BlockController;


You may find it useful to look at the way others have built blocks for 5.7, just grab something free from the marketplace and take particular note of the namespacing and use statements.