(PHP 4 >= 4.0.4, PHP 5, PHP 7)
Calculate square root
GMP gmp_sqrt ( GMP $a )
Calculates square root of a.
Parameters:
a
Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
Returns:
The integer portion of the square root, as a GMP number.
Examples:
gmp_sqrt() example
<?php
$sqrt1 = gmp_sqrt("9");
$sqrt2 = gmp_sqrt("7");
$sqrt3 = gmp_sqrt("1524157875019052100");
echo gmp_strval($sqrt1) . "\n";
echo gmp_strval($sqrt2) . "\n";
echo gmp_strval($sqrt3) . "\n";
?>
The above example will output:
3 2 1234567890
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