What potential issues can arise from using incorrect quotation marks in PHP code, as seen in the provided example?

Using incorrect quotation marks in PHP code can lead to syntax errors and unexpected behavior. It is essential to use the correct quotation marks (single or double) to properly define strings in PHP. To solve this issue, ensure that you consistently use the same type of quotation marks throughout your code.

// Incorrect usage of quotation marks
$message = 'This is a string with incorrect quotation marks";

// Corrected code with consistent quotation marks
$message = 'This is a string with correct quotation marks';