What are the advantages and disadvantages of using different quotation marks (', ", `) in PHP code for better readability and maintainability?

When writing PHP code, choosing the appropriate quotation marks ('', "", or ``) can affect readability and maintainability. Single quotes ('') are best for simple strings that do not require interpolation or special characters. Double quotes ("") allow for variable interpolation and escape sequences. Backticks (``) are used for shell commands and can be useful in certain situations. Example PHP code snippet: 

$name = 'John'; // Single quotes for simple strings
$message = "Hello, $name!"; // Double quotes for variable interpolation
$output = `ls -l`; // Backticks for shell commands

Keywords

PHP quotation marks readability maintainability coding style syntax

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