[lang-ref] ( is_single_and_double_quote_differ ) ( php )
<?php
public function testIsSingleAndDoubleQuoteDiffer(): void
{
// Yes
$value = 'pen';
$this->assertNotSame('This is a $value.', "This is a $value.");
$this->assertNotSame('aaa\nbbb', "aaa\nbbb");
}