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<?php
namespace Faker\Provider;
use Faker\DefaultGenerator;
use Faker\Generator;
use Faker\UniqueGenerator;
use Faker\ValidGenerator;
class Base
{
/**
* @var \Faker\Generator
*/
protected $generator;
/**
* @var \Faker\UniqueGenerator
*/
protected $unique;
public function __construct(Generator $generator)
{
$this->generator = $generator;
}
/**
* Returns a random number between 0 and 9
*
* @return int
*/
public static function randomDigit()
{
return mt_rand(0, 9);
}
/**
* Returns a random number between 1 and 9
*
* @return int
*/
public static function randomDigitNotNull()
{
return mt_rand(1, 9);
}
/**
* Generates a random digit, which cannot be $except
*
* @param int $except
*
* @return int
*/
public static function randomDigitNot($except)
{
$result = self::numberBetween(0, 8);
if ($result >= $except) {
++$result;
}
return $result;
}
/**
* Returns a random integer with 0 to $nbDigits digits.
*
* The maximum value returned is mt_getrandmax()
*
* @param int $nbDigits Defaults to a random number between 1 and 9
* @param bool $strict Whether the returned number should have exactly $nbDigits
*
* @example 79907610
*
* @return int
*/
public static function randomNumber($nbDigits = null, $strict = false)
{
if (!is_bool($strict)) {
throw new \InvalidArgumentException('randomNumber() generates numbers of fixed width. To generate numbers between two boundaries, use numberBetween() instead.');
}
if (null === $nbDigits) {
$nbDigits = static::randomDigitNotNull();
}
$max = 10 ** $nbDigits - 1;
if ($max > mt_getrandmax()) {
throw new \InvalidArgumentException('randomNumber() can only generate numbers up to mt_getrandmax()');
}
if ($strict) {
return mt_rand(10 ** ($nbDigits - 1), $max);
}
return mt_rand(0, $max);
}
/**
* Return a random float number
*
* @param int $nbMaxDecimals
* @param float|int $min
* @param float|int $max
*
* @example 48.8932
*
* @return float
*/
public static function randomFloat($nbMaxDecimals = null, $min = 0, $max = null)
{
if (null === $nbMaxDecimals) {
$nbMaxDecimals = static::randomDigit();
}
if (null === $max) {
$max = static::randomNumber();
if ($min > $max) {
$max = $min;
}
}
if ($min > $max) {
$tmp = $min;
$min = $max;
$max = $tmp;
}
return round($min + mt_rand() / mt_getrandmax() * ($max - $min), $nbMaxDecimals);
}
/**
* Returns a random number between $int1 and $int2 (any order)
*
* @param int $int1 default to 0
* @param int $int2 defaults to 32 bit max integer, ie 2147483647
*
* @example 79907610
*
* @return int
*/
public static function numberBetween($int1 = 0, $int2 = 2147483647)
{
$min = $int1 < $int2 ? $int1 : $int2;
$max = $int1 < $int2 ? $int2 : $int1;
return mt_rand($min, $max);
}
/**
* Returns the passed value
*/
public static function passthrough($value)
{
return $value;
}
/**
* Returns a random letter from a to z
*
* @return string
*/
public static function randomLetter()
{
return chr(mt_rand(97, 122));
}
/**
* Returns a random ASCII character (excluding accents and special chars)
*
* @return string
*/
public static function randomAscii()
{
return chr(mt_rand(33, 126));
}
/**
* Returns randomly ordered subsequence of $count elements from a provided array
*
* @param array $array Array to take elements from. Defaults to a-c
* @param int $count Number of elements to take.
* @param bool $allowDuplicates Allow elements to be picked several times. Defaults to false
*
* @throws \LengthException When requesting more elements than provided
*
* @return array New array with $count elements from $array
*/
public static function randomElements($array = ['a', 'b', 'c'], $count = 1, $allowDuplicates = false)
{
$traversables = [];
if ($array instanceof \Traversable) {
foreach ($array as $element) {
$traversables[] = $element;
}
}
$arr = count($traversables) ? $traversables : $array;
$allKeys = array_keys($arr);
$numKeys = count($allKeys);
if (!$allowDuplicates && $numKeys < $count) {
throw new \LengthException(sprintf('Cannot get %d elements, only %d in array', $count, $numKeys));
}
$highKey = $numKeys - 1;
$keys = $elements = [];
$numElements = 0;
while ($numElements < $count) {
$num = mt_rand(0, $highKey);
if (!$allowDuplicates) {
if (isset($keys[$num])) {
continue;
}
$keys[$num] = true;
}
$elements[] = $arr[$allKeys[$num]];
++$numElements;
}
return $elements;
}
/**
* Returns a random element from a passed array
*
* @param array $array
*/
public static function randomElement($array = ['a', 'b', 'c'])
{
if (!$array || ($array instanceof \Traversable && !count($array))) {
return null;
}
$elements = static::randomElements($array, 1);
return $elements[0];
}
/**
* Returns a random key from a passed associative array
*
* @param array $array
*
* @return int|string|null
*/
public static function randomKey($array = [])
{
if (!$array) {
return null;
}
$keys = array_keys($array);
return $keys[mt_rand(0, count($keys) - 1)];
}
/**
* Returns a shuffled version of the argument.
*
* This function accepts either an array, or a string.
*
* @example $faker->shuffle([1, 2, 3]); // [2, 1, 3]
* @example $faker->shuffle('hello, world'); // 'rlo,h eold!lw'
*
* @see shuffleArray()
* @see shuffleString()
*
* @param array|string $arg The set to shuffle
*
* @return array|string The shuffled set
*/
public static function shuffle($arg = '')
{
if (is_array($arg)) {
return static::shuffleArray($arg);
}
if (is_string($arg)) {
return static::shuffleString($arg);
}
throw new \InvalidArgumentException('shuffle() only supports strings or arrays');
}
/**
* Returns a shuffled version of the array.
*
* This function does not mutate the original array. It uses the
* Fisher–Yates algorithm, which is unbiased, together with a Mersenne
* twister random generator. This function is therefore more random than
* PHP's shuffle() function, and it is seedable.
*
* @see http://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle
*
* @example $faker->shuffleArray([1, 2, 3]); // [2, 1, 3]
*
* @param array $array The set to shuffle
*
* @return array The shuffled set
*/
public static function shuffleArray($array = [])
{
$shuffledArray = [];
$i = 0;
reset($array);
foreach ($array as $key => $value) {
if ($i == 0) {
$j = 0;
} else {
$j = mt_rand(0, $i);
}
if ($j == $i) {
$shuffledArray[] = $value;
} else {
$shuffledArray[] = $shuffledArray[$j];
$shuffledArray[$j] = $value;
}
++$i;
}
return $shuffledArray;
}
/**
* Returns a shuffled version of the string.
*
* This function does not mutate the original string. It uses the
* Fisher–Yates algorithm, which is unbiased, together with a Mersenne
* twister random generator. This function is therefore more random than
* PHP's shuffle() function, and it is seedable. Additionally, it is
* UTF8 safe if the mb extension is available.
*
* @see http://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle
*
* @example $faker->shuffleString('hello, world'); // 'rlo,h eold!lw'
*
* @param string $string The set to shuffle
* @param string $encoding The string encoding (defaults to UTF-8)
*
* @return string The shuffled set
*/
public static function shuffleString($string = '', $encoding = 'UTF-8')
{
if (function_exists('mb_strlen')) {
// UTF8-safe str_split()
$array = [];
$strlen = mb_strlen($string, $encoding);
for ($i = 0; $i < $strlen; ++$i) {
$array[] = mb_substr($string, $i, 1, $encoding);
}
} else {
$array = str_split($string, 1);
}
return implode('', static::shuffleArray($array));
}
private static function replaceWildcard($string, $wildcard, $callback)
{
if (($pos = strpos($string, $wildcard)) === false) {
return $string;
}
for ($i = $pos, $last = strrpos($string, $wildcard, $pos) + 1; $i < $last; ++$i) {
if ($string[$i] === $wildcard) {
$string[$i] = call_user_func($callback);
}
}
return $string;
}
/**
* Replaces all hash sign ('#') occurrences with a random number
* Replaces all percentage sign ('%') occurrences with a not null number
*
* @param string $string String that needs to bet parsed
*
* @return string
*/
public static function numerify($string = '###')
{
// instead of using randomDigit() several times, which is slow,
// count the number of hashes and generate once a large number
$toReplace = [];
if (($pos = strpos($string, '#')) !== false) {
for ($i = $pos, $last = strrpos($string, '#', $pos) + 1; $i < $last; ++$i) {
if ($string[$i] === '#') {
$toReplace[] = $i;
}
}
}
if ($nbReplacements = count($toReplace)) {
$maxAtOnce = strlen((string) mt_getrandmax()) - 1;
$numbers = '';
$i = 0;
while ($i < $nbReplacements) {
$size = min($nbReplacements - $i, $maxAtOnce);
$numbers .= str_pad(static::randomNumber($size), $size, '0', STR_PAD_LEFT);
$i += $size;
}
for ($i = 0; $i < $nbReplacements; ++$i) {
$string[$toReplace[$i]] = $numbers[$i];
}
}
$string = self::replaceWildcard($string, '%', [static::class, 'randomDigitNotNull']);
return $string;
}
/**
* Replaces all question mark ('?') occurrences with a random letter
*
* @param string $string String that needs to bet parsed
*
* @return string
*/
public static function lexify($string = '????')
{
return self::replaceWildcard($string, '?', [static::class, 'randomLetter']);
}
/**
* Replaces hash signs ('#') and question marks ('?') with random numbers and letters
* An asterisk ('*') is replaced with either a random number or a random letter
*
* @param string $string String that needs to be parsed
*
* @return string
*/
public static function bothify($string = '## ??')
{
$string = self::replaceWildcard($string, '*', static function () {
return mt_rand(0, 1) ? '#' : '?';
});
return static::lexify(static::numerify($string));
}
/**
* Replaces * signs with random numbers and letters and special characters
*
* @example $faker->asciify(''********'); // "s5'G!uC3"
*
* @param string $string String that needs to bet parsed
*
* @return string
*/
public static function asciify($string = '****')
{
return preg_replace_callback('/\*/u', [static::class, 'randomAscii'], $string);
}
/**
* Transforms a basic regular expression into a random string satisfying the expression.
*
* @example $faker->regexify('[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}'); // sm0@y8k96a.ej
*
* Regex delimiters '/.../' and begin/end markers '^...$' are ignored.
*
* Only supports a small subset of the regex syntax. For instance,
* unicode, negated classes, unbounded ranges, subpatterns, back references,
* assertions, recursive patterns, and comments are not supported. Escaping
* support is extremely fragile.
*
* This method is also VERY slow. Use it only when no other formatter
* can generate the fake data you want. For instance, prefer calling
* `$faker->email` rather than `regexify` with the previous regular
* expression.
*
* Also note than `bothify` can probably do most of what this method does,
* but much faster. For instance, for a dummy email generation, try
* `$faker->bothify('?????????@???.???')`.
*
* @see https://github.com/icomefromthenet/ReverseRegex for a more robust implementation
*
* @param string $regex A regular expression (delimiters are optional)
*
* @return string
*/
public static function regexify($regex = '')
{
// ditch the anchors
$regex = preg_replace('/^\/?\^?/', '', $regex);
$regex = preg_replace('/\$?\/?$/', '', $regex);
// All {2} become {2,2}
$regex = preg_replace('/\{(\d+)\}/', '{\1,\1}', $regex);
// Single-letter quantifiers (?, *, +) become bracket quantifiers ({0,1}, {0,rand}, {1, rand})
$regex = preg_replace('/(?<!\\\)\?/', '{0,1}', $regex);
$regex = preg_replace('/(?<!\\\)\*/', '{0,' . static::randomDigitNotNull() . '}', $regex);
$regex = preg_replace('/(?<!\\\)\+/', '{1,' . static::randomDigitNotNull() . '}', $regex);
// [12]{1,2} becomes [12] or [12][12]
$regex = preg_replace_callback('/(\[[^\]]+\])\{(\d+),(\d+)\}/', static function ($matches) {
return str_repeat($matches[1], Base::randomElement(range($matches[2], $matches[3])));
}, $regex);
// (12|34){1,2} becomes (12|34) or (12|34)(12|34)
$regex = preg_replace_callback('/(\([^\)]+\))\{(\d+),(\d+)\}/', static function ($matches) {
return str_repeat($matches[1], Base::randomElement(range($matches[2], $matches[3])));
}, $regex);
// A{1,2} becomes A or AA or \d{3} becomes \d\d\d
$regex = preg_replace_callback('/(\\\?.)\{(\d+),(\d+)\}/', static function ($matches) {
return str_repeat($matches[1], Base::randomElement(range($matches[2], $matches[3])));
}, $regex);
// (this|that) becomes 'this' or 'that'
$regex = preg_replace_callback('/\((.*?)\)/', static function ($matches) {
return Base::randomElement(explode('|', str_replace(['(', ')'], '', $matches[1])));
}, $regex);
// All A-F inside of [] become ABCDEF
$regex = preg_replace_callback('/\[([^\]]+)\]/', static function ($matches) {
return '[' . preg_replace_callback('/(\w|\d)\-(\w|\d)/', static function ($range) {
return implode('', range($range[1], $range[2]));
}, $matches[1]) . ']';
}, $regex);
// All [ABC] become B (or A or C)
$regex = preg_replace_callback('/\[([^\]]+)\]/', static function ($matches) {
// remove backslashes (that are not followed by another backslash) because they are escape characters
$match = preg_replace('/\\\(?!\\\)/', '', $matches[1]);
$randomElement = Base::randomElement(str_split($match));
//[.] should not be a random character, but a literal .
return str_replace('.', '\.', $randomElement);
}, $regex);
// replace \d with number and \w with letter and . with ascii
$regex = preg_replace_callback('/\\\w/', [static::class, 'randomLetter'], $regex);
$regex = preg_replace_callback('/\\\d/', [static::class, 'randomDigit'], $regex);
//replace . with ascii except backslash
$regex = preg_replace_callback('/(?<!\\\)\./', static function () {
$chr = static::asciify('*');
if ($chr === '\\') {
$chr .= '\\';
}
return $chr;
}, $regex);
// remove remaining single backslashes
$regex = str_replace('\\\\', '[:escaped_backslash:]', $regex);
$regex = str_replace('\\', '', $regex);
$regex = str_replace('[:escaped_backslash:]', '\\', $regex);
// phew
return $regex;
}
/**
* Converts string to lowercase.
* Uses mb_string extension if available.
*
* @param string $string String that should be converted to lowercase
*
* @return string
*/
public static function toLower($string = '')
{
return extension_loaded('mbstring') ? mb_strtolower($string, 'UTF-8') : strtolower($string);
}
/**
* Converts string to uppercase.
* Uses mb_string extension if available.
*
* @param string $string String that should be converted to uppercase
*
* @return string
*/
public static function toUpper($string = '')
{
return extension_loaded('mbstring') ? mb_strtoupper($string, 'UTF-8') : strtoupper($string);
}
/**
* Chainable method for making any formatter optional.
*
* @param float|int $weight Set the probability of receiving a null value.
* "0" will always return null, "1" will always return the generator.
* If $weight is an integer value, then the same system works
* between 0 (always get false) and 100 (always get true).
*
* @return mixed|null
*/
public function optional($weight = 0.5, $default = null)
{
// old system based on 0.1 <= $weight <= 0.9
// TODO: remove in v2
if ($weight > 0 && $weight < 1 && mt_rand() / mt_getrandmax() <= $weight) {
return $this->generator;
}
// new system with percentage
if (is_int($weight) && mt_rand(1, 100) <= $weight) {
return $this->generator;
}
return new DefaultGenerator($default);
}
/**
* Chainable method for making any formatter unique.
*
* <code>
* // will never return twice the same value
* $faker->unique()->randomElement(array(1, 2, 3));
* </code>
*
* @param bool $reset If set to true, resets the list of existing values
* @param int $maxRetries Maximum number of retries to find a unique value,
* After which an OverflowException is thrown.
*
* @throws \OverflowException When no unique value can be found by iterating $maxRetries times
*
* @return UniqueGenerator A proxy class returning only non-existing values
*/
public function unique($reset = false, $maxRetries = 10000)
{
if ($reset || !$this->unique) {
$this->unique = new UniqueGenerator($this->generator, $maxRetries);
}
return $this->unique;
}
/**
* Chainable method for forcing any formatter to return only valid values.
*
* The value validity is determined by a function passed as first argument.
*
* <code>
* $values = array();
* $evenValidator = function ($digit) {
* return $digit % 2 === 0;
* };
* for ($i=0; $i < 10; $i++) {
* $values []= $faker->valid($evenValidator)->randomDigit;
* }
* print_r($values); // [0, 4, 8, 4, 2, 6, 0, 8, 8, 6]
* </code>
*
* @param Closure $validator A function returning true for valid values
* @param int $maxRetries Maximum number of retries to find a unique value,
* After which an OverflowException is thrown.
*
* @throws \OverflowException When no valid value can be found by iterating $maxRetries times
*
* @return ValidGenerator A proxy class returning only valid values
*/
public function valid($validator = null, $maxRetries = 10000)
{
return new ValidGenerator($this->generator, $validator, $maxRetries);
}
}
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