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<?php class Php8CompatUtils { public static function eq($a, $b): bool { // If both $a and $b are of type strings, compare them as strings if (is_string($a) && is_string($b)) { return $a == $b; // may not be === because php says '42' equals '042' true yet '42' === '042' is false. } // If both $a and $b are numeric strings, compare them as numbers if (is_numeric($a) && is_numeric($b)) { return $a == $b; } // If $a is an empty string and $b is 0, or vice versa, return true if (($a === '' && $b === 0) || ($a === 0 && $b === '')) { return true; } // If $a is a non-numeric string and $b is 0, or vice versa, return true if ((is_string($a) && ($a !== '') && ($b === 0)) || (($a === 0) && is_string($b) && ($b !== ''))) { return true; } // special case '123abc' == 123 .. php 7 casts 123abc to 123, then 123 == 123 results in true. lets mimic that. if ((is_string($a) && ($a !== '') && (is_numeric($b)) && ((bool)$b))) { $number = filter_var($a, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION); //"-234.56xyz" return $number == $b; } if (is_numeric($a) && ((bool)$a) && is_string($b) && ($b !== '')) { $number = filter_var($b, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION); //"-234.56xyz" return $a == $number; } // If $a is a number and $b is a non-numeric string, cast $a to string and compare if (is_numeric($a) && is_string($b)) { return strval($a) == $b; } // If $b is a number and $a is a non-numeric string, cast $b to string and compare if (is_string($a) && is_numeric($b)) { return $a == strval($b); } if (is_array($a) || is_array($b)) { return static::standardArrayCompare($a, $b) == 0; } // If $a and $b are both non-numeric strings, compare them directly, we should return true if they are the same return $a == $b; } public static function gt($a, $b): bool { if (static::eq($a, $b)) { return false; } if (is_array($a) || is_array($b)) { return static::standardArrayCompare($a, $b) < 0; } return $a > $b; } public static function lt($a, $b): bool { if (static::eq($a, $b)) { return false; } if (is_array($a) || is_array($b)) { return static::standardArrayCompare($a, $b) > 0; } return $a < $b; } public static function gte($a, $b): bool { if (is_array($a) || is_array($b)) { return static::standardArrayCompare($a, $b) >= 0; } return static::eq($a, $b) || ($a > $b); } public static function lte($a, $b): bool { if (is_array($a) || is_array($b)) { return static::standardArrayCompare($a, $b) <= 0; } return static::eq($a, $b) || ($a < $b); } private static function standardArrayCompare($op1, $op2) { if (count($op1) < count($op2)) { return -1; // $op1 < $op2 } elseif (count($op1) > count($op2)) { return 1; // $op1 > $op2 } foreach ($op1 as $key => $val) { if (!array_key_exists($key, $op2)) { return 1; } elseif (static::lt($val, $op2[$key])) { return -1; } elseif (static::gt($val, $op2[$key])) { return 1; } } return 0; // $op1 == $op2 } } $a = [0 => '']; $b = [0 => 0]; var_dump(Php8CompatUtils::eq($a, $b)); var_dump($a == $b);

Version	System time (s)	User time (s)	Memory (MiB)
8.4.3	0.009	0.010	18.86
8.4.2	0.042	0.007	17.43
8.4.1	0.037	0.009	17.46
8.3.16	0.014	0.007	16.42
8.3.15	0.041	0.005	16.53
8.3.14	0.040	0.003	16.62
8.3.13	0.036	0.006	16.47
8.3.12	0.037	0.005	16.50
8.3.11	0.021	0.014	16.54
8.3.10	0.036	0.005	16.39
8.3.9	0.037	0.009	16.67
8.3.8	0.037	0.007	16.52
8.3.7	0.032	0.008	16.52
8.3.6	0.032	0.008	16.61
8.3.5	0.028	0.005	16.53
8.3.4	0.022	0.007	17.63
8.3.3	0.026	0.011	17.46
8.3.2	0.026	0.010	17.44
8.3.1	0.024	0.011	17.56
8.3.0	0.022	0.006	17.51
8.2.27	0.031	0.005	16.25
8.2.26	0.043	0.006	16.49
8.2.25	0.029	0.013	16.73
8.2.24	0.022	0.017	16.41
8.2.23	0.027	0.012	16.33
8.2.22	0.025	0.009	16.51
8.2.21	0.025	0.011	16.29
8.2.20	0.031	0.006	16.64
8.2.19	0.033	0.005	16.34
8.2.18	0.024	0.015	16.51
8.2.17	0.026	0.010	17.73
8.2.16	0.025	0.006	17.70
8.2.15	0.030	0.010	17.53
8.2.14	0.036	0.005	17.40
8.2.13	0.034	0.006	17.53
8.2.12	0.031	0.011	17.63
8.2.11	0.035	0.008	17.53
8.2.10	0.030	0.008	17.56
8.2.9	0.028	0.011	17.69
8.2.8	0.032	0.008	17.27
8.2.7	0.032	0.006	17.36
8.2.6	0.019	0.011	17.58
8.2.5	0.037	0.003	17.49
8.2.4	0.031	0.005	17.60
8.2.3	0.031	0.008	17.53
8.2.2	0.025	0.011	17.38
8.2.1	0.025	0.010	17.65
8.2.0	0.028	0.007	17.57