How can developers improve their code review process to catch simple errors like concatenation mistakes?

To catch simple errors like concatenation mistakes during the code review process, developers can implement automated tools or linters that can detect common coding mistakes. Additionally, developers can also encourage peer code reviews where team members can provide feedback and catch errors before they are merged into the codebase.

// Example code snippet with concatenation mistake
$name = "John";
$message = "Hello, " $name; // Missing concatenation operator (.)
echo $message;

// Corrected code snippet
$name = "John";
$message = "Hello, " . $name; // Corrected concatenation with (.)
echo $message;