PHP Manual: Compare two arbitrary precision numbers

int bccomp ( string $left_operand , string $right_operand [, int $scale ] )

Compares the left_operand to the right_operand and returns the result as an integer.

left_operand: The left operand, as a string.
right_operand: The right operand, as a string.
scale: The optional scale parameter is used to set the number of digits after the decimal place which will be used in the comparison.

Returns 0 if the two operands are equal, 1 if the left_operand is larger than the right_operand, -1 otherwise.

Example #1 bccomp example


<?php

echo bccomp('1', '2') . "\n";   // -1
echo bccomp('1.00001', '1', 3); // 0
echo bccomp('1.00001', '1', 5); // 1

?>