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<?php $input1 = "hello"; $input2 = "hello,there"; var_dump( explode( ',', $input1 ) ); var_dump( explode( ',', $input2 ) ); ?>
Output for 4.3.0 - 7.2.0
array(1) { [0]=> string(5) "hello" } array(2) { [0]=> string(5) "hello" [1]=> string(5) "there" }