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<?php |
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|
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/** |
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* This file is part of the ramsey/collection library |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @copyright Copyright (c) Ben Ramsey <[email protected]> |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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|
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declare(strict_types=1); |
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|
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namespace Ramsey\Collection\Tool; |
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|
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use DateTimeInterface; |
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|
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use function get_class; |
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use function get_resource_type; |
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use function is_array; |
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use function is_bool; |
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use function is_callable; |
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use function is_resource; |
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use function is_scalar; |
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|
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/** |
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* Provides functionality to express a value as string |
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*/ |
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trait ValueToStringTrait |
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{ |
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/** |
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* Returns a string representation of the value. |
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* |
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* - null value: `'NULL'` |
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* - boolean: `'TRUE'`, `'FALSE'` |
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* - array: `'Array'` |
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* - scalar: converted-value |
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* - resource: `'(type resource #number)'` |
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* - object with `__toString()`: result of `__toString()` |
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* - object DateTime: ISO 8601 date |
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* - object: `'(className Object)'` |
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* - anonymous function: same as object |
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* |
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* @param mixed $value the value to return as a string. |
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*/ |
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protected function toolValueToString($value): string |
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{ |
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// null |
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if ($value === null) { |
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return 'NULL'; |
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} |
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|
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// boolean constants |
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if (is_bool($value)) { |
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return $value ? 'TRUE' : 'FALSE'; |
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} |
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|
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// array |
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if (is_array($value)) { |
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return 'Array'; |
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} |
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|
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// scalar types (integer, float, string) |
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if (is_scalar($value)) { |
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return (string) $value; |
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} |
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|
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// resource |
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if (is_resource($value)) { |
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return '(' . get_resource_type($value) . ' resource #' . (int) $value . ')'; |
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} |
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|
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// If we don't know what it is, use var_export(). |
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if (!is_object($value)) { |
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return '(' . var_export($value, true) . ')'; |
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} |
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|
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// From here, $value should be an object. |
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|
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// __toString() is implemented |
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if (is_callable([$value, '__toString'])) { |
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return (string) $value->__toString(); |
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} |
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|
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// object of type \DateTime |
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if ($value instanceof DateTimeInterface) { |
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return $value->format('c'); |
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} |
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|
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// unknown type |
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return '(' . get_class($value) . ' Object)'; |
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} |
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} |
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|
