What common mistake is highlighted in the provided PHP code snippet, and how can it be avoided?

The common mistake highlighted in the provided PHP code snippet is the incorrect way of concatenating strings using the "+" operator instead of the "." operator. In PHP, the "." operator is used for string concatenation. To fix this issue, simply replace the "+" operator with the "." operator in the code snippet. 

// Incorrect way of concatenating strings
$name = "John" + "Doe";
echo $name; // Output: 0

// Correct way of concatenating strings
$name = "John" . "Doe";
echo $name; // Output: JohnDoe

Keywords

syntax error missing semicolon PHP_EOL concatenation error handling

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