What is the significance of using curly braces in PHP code blocks, particularly in relation to for loops?

Using curly braces in PHP code blocks, particularly in for loops, is significant because it helps to clearly define the scope of the code within the loop. Without curly braces, only the next statement after the loop declaration is considered part of the loop, which can lead to unexpected behavior or errors. By enclosing the code block within curly braces, you ensure that all statements within the loop are executed as intended. 

// Incorrect way of writing a for loop without curly braces
for ($i = 0; $i < 5; $i++)
    echo $i;

// Correct way of writing a for loop with curly braces
for ($i = 0; $i < 5; $i++) {
    echo $i;
}

Keywords

PHP curly braces code blocks for loops significance

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