PHP, Mathematical Functions


<?php



array|false get_extension_funcs ( string $extension )



where,



$extension = Name of the extension to be checked

                          

                          One of the extension names 

                          obtained through the function:

                          get_loaded_extensions 

?>

$extension

The module name to get the extension functions.

In order to have a complete list of all the functions available in each of the installed extensions, we use get_loaded_extensions which provides the names of said extensions in the format of an ARRAY.


<?php

              

array get_loaded_extensions([ bool $zend_extensions = FALSE ] ) 





where, 



$zend_extensions = if TRUE only return Zend extensions 

                             The default, FALSE return regular extensions 



?>

So, we use get_extension_funcs to know the names of the functions available in each extension.

Therefore, run the next exercise to see what functions are available in each extension present in your system.

These functions allow for arbitrary-length integers to be worked with using the GNU MP library.

The GMP can be either a GMP OBJECT, an INTEGER or an INTEGER NUMERIC STRING provided that it is possible to convert the latter to a number.

We will study all MATHEMATICS functions available in the gmp extensions.

As this depends on the PHP version, run the next exercises on your system.

GNU - Multiple Precision

EXERCISE


<table width="100%" cellspacing="3" cellpadding="3" 

border="1" align="center">

<tbody><tr><td colspan="2">AVAILABLE FUNCTIONS</td></tr>

<tr><td>NAME</td><td>LIBRARY</td></tr>

<?php



// The result of this exercise will depend

// of the configuration of your system



$exts = get_loaded_extensions ();



foreach ( $exts as $xt) {

    

$exts01 = get_extension_funcs ($xt);



if( $exts01 != FALSE) {

    

foreach ( $exts01 as $func ) { 



echo '<tr><td>' . $func . '</td><td>' . $xt . '</td></tr>';

    

} } }

?>

<tr><td colspan="2">ed48</td></tr></tbody></table>

EXERCISE


<?php



$ext = "gmp";



// The result of this exercise will depend

// of the configuration of your system



// The module name to get the extension functions,

// in this case: gmp (case insentive)



if(extension_loaded($ext))

{

echo '<table width="100%" cellspacing="3" 

cellpadding="3" border="1" align="center">

<tbody><tr><td colspan="2">

                AVAILABLE gmp FUNCTIONS</td></tr><tr><td>NAME</td>

<td>EXT</td></tr>';



$mod = get_extension_funcs ($ext);



foreach ( $mod as $k => $xt)

{

echo '<tr><td>( ' . ($k+1) . ' ) ' . $xt . '</td><td>' . $ext . '</td></tr>';   

}

echo '<tr><td colspan="2">ed48</td></tr></tbody></table>';

}

else

{

echo 'The extension "' . $ext . '" is NOT loaded!<br>';

exit;

}    



?>

RESULT

gmp FUNCTIONS
ORD	NAME
1	gmp_init
2	gmp_import
3	gmp_export
4	gmp_intval
5	gmp_strval
6	gmp_add
7	gmp_sub
8	gmp_mul
9	gmp_div_qr
10	gmp_div_q
11	gmp_div_r
12	gmp_div
13	gmp_mod
14	gmp_divexact
15	gmp_neg
16	gmp_abs
17	gmp_fact
18	gmp_sqrt
19	gmp_sqrtrem
20	gmp_root
21	gmp_rootrem
22	gmp_pow
23	gmp_powm
24	gmp_perfect_square
25	gmp_perfect_power
26	gmp_prob_prime
27	gmp_gcd
28	gmp_gcdext
29	gmp_lcm
30	gmp_invert
31	gmp_jacobi
32	gmp_legendre
33	gmp_kronecker
34	gmp_cmp
35	gmp_sign
36	gmp_random_seed
37	gmp_random_bits
38	gmp_random_range
39	gmp_and
40	gmp_or
41	gmp_com
42	gmp_xor
43	gmp_setbit
44	gmp_clrbit
45	gmp_testbit
46	gmp_scan0
47	gmp_scan1
48	gmp_popcount
49	gmp_hamdist
50	gmp_nextprime
51	gmp_binomial
ed48