What are common misunderstandings or mistakes that PHP beginners often encounter?

One common misunderstanding among PHP beginners is the confusion between single quotes and double quotes when working with strings. Single quotes are used to display the string as is, while double quotes allow for variable interpolation. To solve this issue, beginners should understand when to use each type of quote based on their specific needs. 

// Incorrect usage of single quotes with variable interpolation
$name = "Alice";
echo 'Hello, $name'; // This will output: Hello, $name

// Correct usage of double quotes for variable interpolation
$name = "Alice";
echo "Hello, $name"; // This will output: Hello, Alice

Keywords

syntax errors variable scope undefined index SQL injection file permissions

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