Parse error: syntax error, unexpected '*'

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PHP parse/syntax errors; and how to solve them? 13 answers

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Your syntax as it is, is correct. The problem is your PHP version. The ** operator was introduced in PHP 5.6 and you probably have something below.

So either update your PHP or use pow() .

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OP had an extra * over

(1 + $rate / 100) ** $time)

which results into PHP syntax error Unexpected * within PHP verison < 5.6.0 and works fine for the higher versions

function ci($principle, $rate, $time) {
    $ci = ($principle * (((1 + $rate / 100) * $time) - 1));
                                         //^^ removed extra *
    echo $ci;
}

ci(10, 10, 10);

Demo

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