equal-test.php

<?php
$values = array(null, true, false, 0, 0.0, '', ' ', '0', '00', '0.0', '0x0', '0X0', 1, 1.0, '1', '01', '1.0', '0x1', '0X1', '1e0', '1E0', 'a', '1a', INF, -INF, NAN, PHP_INT_MAX, ~PHP_INT_MAX, 9223372036854775808.0, '9223372036854775807', '9223372036854775807.0', '9223372036854775808', '9223372036854775808.0', '9999999999999999999.0', '9999999999999999999.1', '10000000000000000000.0', '10000000000000000000.00', '1e19', '1E19');

foreach ($values as $a) {
    if (is_float($a)) {
        $a_str = sprintf('%-20.1f', $a);
    } else {
        $a_str = var_export($a, true);
    }
    foreach ($values as $b) {
        if (is_float($b)) {
            $b_str = sprintf('%-20.1f', $b);
        } else {
            $b_str = var_export($b, true);
        }
        if ($a == $b) {
            $op = '==';
        } elseif ($a > $b) {
            $op = '>';
        } elseif ($a < $b) {
            $op = '<';
        } else {
            $op = '!=';
        }
        echo $a_str,$op,$b_str,"\n";
    }
}