Monday, January 18, 2016

Wordpress Plugin Development

Symptoms:
WP produces the following warning message upon plugin activation:
"The plugin generated ### characters of unexpected output during activation"

You can debug the actual characters by the help of this plugin:
https://wordpress.org/plugins/debug-plugin-activation-errors/

If the characters prove to be whitespaces, make sure you have no whitespaces after the final ?> tag.

You can find all ?> tags by issuing:

grep "?>" -R .

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