3v4l.org

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<?php $array = array(); $array['references1'] = 'Foo1 ◻◻◻◻◻◻◻◻◻◻◻◻'; $array['references2'] = 'Foo2 ◻◻◻◻◻◻◻◻◻◻◻◻'; var_export( preg_replace('/[^!-~\s]+/', '', $array) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
array ( 'references1' => 'Foo1 ', 'references2' => 'Foo2 ', )

preferences:
106.8 ms | 1273 KiB | 4 Q