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How can one ensure the validity and correctness of syntax when using nested if statements in PHP?

When using nested if statements in PHP, it is crucial to ensure the validity and correctness of syntax by properly structuring the conditions and braces. One way to do this is by paying close attention to the indentation of the code to visually represent the nesting levels. Additionally, using proper code commenting can help clarify the logic of the nested if statements.

php 
// Example of nested if statements with proper syntax
if ($condition1) {
    if ($condition2) {
        // Code block for condition2
    } else {
        // Code block for else of condition2
    }
} else {
    // Code block for else of condition1
}

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