[ 0 => '_SINGLE_QUOTE_|<p>\\s*\\w|_SINGLE_QUOTE_', 1 => 'to_lower', 2 => '<p>There is an elephant</p>', ]
$expected_output
=
$test_output
$test_output
=
[ 'result' => [ 'mixed' => '<p>there is an elephant</p>', ], 'php_version' => '7.1.33 Linux x86_64', ]
Example #2
$input
=
[ 0 => '_SINGLE_QUOTE_|(\\d{2}/\\d{2}/)(\\d{4})|_SINGLE_QUOTE_', 1 => 'next_year', 2 => 'April fools day is 04/01/2002 Last christmas was 12/24/2001 ', ]
$expected_output
=
$test_output
$test_output
=
[ 'result' => [ 'mixed' => 'April fools day is 04/01/2003 Last christmas was 12/24/2002 ', ], 'php_version' => '7.1.33 Linux x86_64', ]