<?php
 
$shortCodes = array("shortcode_name", "shortcode_name2", "shortcode_name3");
 
$text = <<< EOF
My example text [shortcode_name]content of shortcode[/shortcode_name] is cool.
another example text [shortcode_name2]content of shortcode[/shortcode_name2] is cool.
Yet another example  [shortcode_name3]content of shortcode[/shortcode_name3] is cool.
EOF;
 
 
foreach($shortCodes as $shortCode){
$text = preg_replace("%\[$shortCode\].*?\[/$shortCode\]%i", '', $text);      
$text= preg_replace('/\s{2,}/i', ' ', $text); //remove 2 or more spaces
 
}
 
echo $text;
 
 

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