GmpDivisionPairUsedAsNumber

error native on by default

Group: Probable bugs

Select a quotient or remainder before using the GMP result.

Example

<?php
echo gmp_strval(gmp_div_qr('23', '4'));

Reported:

• line 2: Select a quotient or remainder before using the GMP result.

Detection

• The array result of gmp_div_qr directly or through an unchanged local variable reaches a numeric-operand slot of gmp_strval, gmp_intval, gmp_add, gmp_sub, gmp_mul, gmp_div_q, gmp_div_r, gmp_div_qr, gmp_mod, gmp_cmp, gmp_abs, gmp_neg, gmp_sqrt or gmp_pow (for gmp_pow only the base, its first argument or num, is an operand slot; the exponent is not inspected) without indexing.
• Resolve builtin functions, extension classes, constants and method receivers, including aliases and supported named arguments. Inspect reachable operations in one lexical scope with bounded local flow.
• Emit one finding per violating operation. Never infer policy from names or comments. When the proof is inconclusive, nothing is reported.

Exceptions (no report)

• Exclude shadowed or unresolved symbols, incomplete code, unknown required constants, ambiguous receiver identity and unsupported versions. Reassignment, escaping aliases, and unknown calls invalidate dependent flow facts.
• Both @custos-ignore GmpDivisionPairUsedAsNumber and @noinspection GmpDivisionPairUsedAsNumber suppress this native rule.

Fix

None. A safe repair requires choosing values, error handling, or application behavior.

PHP versions

Apply throughout PHP 5.3–8.5 only where the extension API and syntax exist. Do not flag API unavailability through this rule.

Options

None. Use normal rule configuration to enable or disable the inspection.

Configure

In custos.json:

{
  "rules": {
    "GmpDivisionPairUsedAsNumber": {
      "enabled": false
    }
  }
}

Suppress

Before the statement or declaration (or the first statement of the file):

// @custos-ignore GmpDivisionPairUsedAsNumber