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Revision Autor Zeilennr. Zeile
148 lars 1 
<?php
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/**
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 * This file is part of the Nette Framework (https://nette.org)
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 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
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 */
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declare(strict_types=1);
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namespace Nette\Utils;
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use Nette;
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class Helpers
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{
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	/**
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	 * Executes a callback and returns the captured output as a string.
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	 */
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	public static function capture(callable $func): string
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	{
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		ob_start(function () {});
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		try {
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			$func();
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			return ob_get_clean();
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		} catch (\Throwable $e) {
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			ob_end_clean();
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			throw $e;
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		}
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	}
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	/**
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	 * Returns the last occurred PHP error or an empty string if no error occurred. Unlike error_get_last(),
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	 * it is nit affected by the PHP directive html_errors and always returns text, not HTML.
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	 */
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	public static function getLastError(): string
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	{
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		$message = error_get_last()['message'] ?? '';
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		$message = ini_get('html_errors') ? Html::htmlToText($message) : $message;
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		$message = preg_replace('#^\w+\(.*?\): #', '', $message);
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		return $message;
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	}
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	/**
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	 * Converts false to null, does not change other values.
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	 * @param  mixed  $value
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	 * @return mixed
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	 */
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	public static function falseToNull($value)
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	{
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		return $value === false ? null : $value;
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	}
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	/**
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	 * Returns value clamped to the inclusive range of min and max.
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	 * @param  int|float  $value
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	 * @param  int|float  $min
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	 * @param  int|float  $max
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	 * @return int|float
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	 */
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	public static function clamp($value, $min, $max)
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	{
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		if ($min > $max) {
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			throw new Nette\InvalidArgumentException("Minimum ($min) is not less than maximum ($max).");
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		}
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		return min(max($value, $min), $max);
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	}
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	/**
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	 * Looks for a string from possibilities that is most similar to value, but not the same (for 8-bit encoding).
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	 * @param  string[]  $possibilities
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	 */
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	public static function getSuggestion(array $possibilities, string $value): ?string
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	{
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		$best = null;
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		$min = (strlen($value) / 4 + 1) * 10 + .1;
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		foreach (array_unique($possibilities) as $item) {
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			if ($item !== $value && ($len = levenshtein($item, $value, 10, 11, 10)) < $min) {
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				$min = $len;
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				$best = $item;
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			}
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		}
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		return $best;
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	}
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}