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<?php |
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namespace nochso\Omni; |
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/** |
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* Numeric validates and converts mixed types to numeric types. |
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*/ |
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class Numeric |
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{ |
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/** |
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* Ensure integer or or float value by safely converting. |
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* |
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* Safe conversions to int or float: |
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* |
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* ``` |
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* '-1' => -1 |
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* '+00.0' => 0.0 |
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* '1' => 1 |
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* ' 1 ' => 1 |
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* '01' => 1 |
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* '0.1' => 0.1 |
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* '.1' => 0.1 |
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* ``` |
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* |
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* Invalid conversions: |
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* |
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* ``` |
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* 'x' |
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* '0a' |
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* '' |
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* '-' |
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* ' ' |
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* '0+1' |
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* '.' |
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* ',' |
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* '0x0' |
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* ``` |
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* |
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* @param mixed $value |
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* |
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* @throws \InvalidArgumentException If the value could not be safely converted to int or float. |
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* |
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* @return int|float |
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*/ |
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public static function ensure($value) |
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{ |
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if (is_int($value) || is_float($value)) { |
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return $value; |
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} |
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$value = trim($value); |
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if (is_numeric($value)) { |
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// Results in either int or float |
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return $value + 0; |
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} |
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throw new \InvalidArgumentException(sprintf( |
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'Expecting value of type int, float or compatible, got variable of type %s instead.', |
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Type::summarize($value) |
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)); |
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} |
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/** |
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* ensureInteger values by safely converting. |
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* |
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* These are safe conversions because no information is lost: |
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* |
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* ``` |
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* 1 => 1 |
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* '1.00' => 1 |
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* '1' => 1 |
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* '+1' => 1 |
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* ``` |
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* |
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* These are invalid conversions because information would be lost: |
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* |
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* ``` |
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* 0.1 |
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* '0.1' |
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* '.1' |
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* ``` |
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* |
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* If you don't care about this, you should cast to int instead: `(int)$value` |
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* |
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* @param mixed $value |
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* |
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* @throws \InvalidArgumentException If floating point information would be lost, i.e. it does not look like an integer. |
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* |
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* @return int |
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*/ |
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public static function ensureInteger($value) |
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{ |
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$numeric = self::ensure($value); |
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if ((float) (int) $numeric !== (float) $numeric) { |
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throw new \InvalidArgumentException(sprintf( |
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"Could not safely convert value '%s' of type '%s' to integer because of trailing decimal places.", |
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$value, |
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Type::summarize($value) |
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)); |
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} |
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return (int) $numeric; |
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} |
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/** |
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* ensureFloat values by safely converting. |
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* |
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* For example the following conversions are safe: |
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* |
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* ``` |
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* '0' => 0.0 |
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* '0.0' => 0.0 |
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* '0.1' => 0.1 |
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* '-5.1' => 5.1 |
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* ``` |
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* |
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* @param mixed $value |
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* |
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* @throws \InvalidArgumentException If value could not be safely converted to float. |
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* |
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* @return float |
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*/ |
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public static function ensureFloat($value) |
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{ |
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return (float) self::ensure($value); |
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} |
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} |
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nochso /
omni
