What are the best practices for declaring and initializing variables in PHP 7 to avoid internal server errors?

When declaring and initializing variables in PHP 7, it is important to ensure that variables are properly initialized before using them to avoid internal server errors. One common mistake is trying to access a variable that has not been defined, which can lead to undefined variable errors. To prevent this, always declare variables before using them and initialize them with a default value if necessary. 

// Correct way to declare and initialize variables in PHP 7
$variable1 = ''; // Initializing variable with default value
$variable2 = 0; // Initializing variable with default value

// Example usage of the variables
echo $variable1;
echo $variable2;

Keywords

PHP 7 variable declaration variable initialization internal server error error handling

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