How can syntax errors be identified and resolved in PHP code, particularly when related to unexpected variables?

Syntax errors related to unexpected variables in PHP code can be identified and resolved by carefully reviewing the code for any missing or misplaced variables, ensuring that all variables are properly declared and initialized before use. Additionally, using an IDE with syntax highlighting and error checking features can help pinpoint the exact location of the error.

// Example code snippet with unexpected variable error
$variable1 = "Hello";
echo $variable2; // This line will cause a syntax error due to $variable2 not being defined

// Corrected code snippet with proper variable declaration
$variable1 = "Hello";
$variable2 = "World";
echo $variable1 . " " . $variable2; // Output: Hello World