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<?php function short_check($a) { var_dump($a); if($a[1]==$a[2]) return ''; return $a[0]; } $_content = 'hello [shortcode some params]inner content[/shortcode] there'; $_content = preg_replace_callback('#\[(\S+)[^\]]+[^\[]+\[\/(\S+)\]#iu', 'short_check', $_content); echo $_content;
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) { [0]=> string(48) "[shortcode some params]inner content[/shortcode]" [1]=> string(9) "shortcode" [2]=> string(9) "shortcode" } hello there

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