Why is using multiple single quotes within a string problematic in PHP?

Using multiple single quotes within a string in PHP can be problematic because PHP interprets each single quote as the end of the string. This can lead to syntax errors or unexpected behavior in your code. To solve this issue, you can escape the single quotes within the string using a backslash (\) before each single quote.

$string = 'This is a string with \'single quotes\' escaped.';
echo $string;