%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* This file is part of the Nette Framework (http://nette.org)
*
* Copyright (c) 2004 David Grudl (http://davidgrudl.com)
*
* For the full copyright and license information, please view
* the file license.txt that was distributed with this source code.
*/
namespace Nette\Utils;
use Nette,
Nette\Diagnostics\Debugger;
/**
* String tools library.
*
* @author David Grudl
*/
class Strings
{
/**
* Static class - cannot be instantiated.
*/
final public function __construct()
{
throw new Nette\StaticClassException;
}
/**
* Checks if the string is valid for the specified encoding.
* @param string byte stream to check
* @param string expected encoding
* @return bool
*/
public static function checkEncoding($s, $encoding = 'UTF-8')
{
return $s === self::fixEncoding($s, $encoding);
}
/**
* Returns correctly encoded string.
* @param string byte stream to fix
* @param string encoding
* @return string
*/
public static function fixEncoding($s, $encoding = 'UTF-8')
{
// removes xD800-xDFFF, xFEFF, x110000 and higher
if (strcasecmp($encoding, 'UTF-8') === 0) {
$s = str_replace("\xEF\xBB\xBF", '', $s); // remove UTF-8 BOM
}
if (PHP_VERSION_ID >= 50400) {
ini_set('mbstring.substitute_character', 'none');
return mb_convert_encoding($s, $encoding, $encoding);
}
return @iconv('UTF-16', $encoding . '//IGNORE', iconv($encoding, 'UTF-16//IGNORE', $s)); // intentionally @
}
/**
* Returns a specific character.
* @param int codepoint
* @param string encoding
* @return string
*/
public static function chr($code, $encoding = 'UTF-8')
{
return iconv('UTF-32BE', $encoding . '//IGNORE', pack('N', $code));
}
/**
* Starts the $haystack string with the prefix $needle?
* @param string
* @param string
* @return bool
*/
public static function startsWith($haystack, $needle)
{
return strncmp($haystack, $needle, strlen($needle)) === 0;
}
/**
* Ends the $haystack string with the suffix $needle?
* @param string
* @param string
* @return bool
*/
public static function endsWith($haystack, $needle)
{
return strlen($needle) === 0 || substr($haystack, -strlen($needle)) === $needle;
}
/**
* Does $haystack contain $needle?
* @param string
* @param string
* @return bool
*/
public static function contains($haystack, $needle)
{
return strpos($haystack, $needle) !== FALSE;
}
/**
* Returns a part of UTF-8 string.
* @param string
* @param int
* @param int
* @return string
*/
public static function substring($s, $start, $length = NULL)
{
if ($length === NULL) {
$length = self::length($s);
}
return function_exists('mb_substr') ? mb_substr($s, $start, $length, 'UTF-8') : iconv_substr($s, $start, $length, 'UTF-8'); // MB is much faster
}
/**
* Removes special controls characters and normalizes line endings and spaces.
* @param string UTF-8 encoding or 8-bit
* @return string
*/
public static function normalize($s)
{
// standardize line endings to unix-like
$s = str_replace("\r\n", "\n", $s); // DOS
$s = strtr($s, "\r", "\n"); // Mac
// remove control characters; leave \t + \n
$s = preg_replace('#[\x00-\x08\x0B-\x1F\x7F]+#', '', $s);
// right trim
$s = preg_replace('#[\t ]+$#m', '', $s);
// leading and trailing blank lines
$s = trim($s, "\n");
return $s;
}
/**
* Converts to ASCII.
* @param string UTF-8 encoding
* @return string ASCII
*/
public static function toAscii($s)
{
$s = preg_replace('#[^\x09\x0A\x0D\x20-\x7E\xA0-\x{2FF}\x{370}-\x{10FFFF}]#u', '', $s);
$s = strtr($s, '`\'"^~', "\x01\x02\x03\x04\x05");
if (ICONV_IMPL === 'glibc') {
$s = @iconv('UTF-8', 'WINDOWS-1250//TRANSLIT', $s); // intentionally @
$s = strtr($s, "\xa5\xa3\xbc\x8c\xa7\x8a\xaa\x8d\x8f\x8e\xaf\xb9\xb3\xbe\x9c\x9a\xba\x9d\x9f\x9e"
. "\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3"
. "\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8"
. "\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf8\xf9\xfa\xfb\xfc\xfd\xfe\x96",
"ALLSSSSTZZZallssstzzzRAAAALCCCEEEEIIDDNNOOOOxRUUUUYTsraaaalccceeeeiiddnnooooruuuuyt-");
} else {
$s = @iconv('UTF-8', 'ASCII//TRANSLIT', $s); // intentionally @
}
$s = str_replace(array('`', "'", '"', '^', '~'), '', $s);
return strtr($s, "\x01\x02\x03\x04\x05", '`\'"^~');
}
/**
* Converts to web safe characters [a-z0-9-] text.
* @param string UTF-8 encoding
* @param string allowed characters
* @param bool
* @return string
*/
public static function webalize($s, $charlist = NULL, $lower = TRUE)
{
$s = self::toAscii($s);
if ($lower) {
$s = strtolower($s);
}
$s = preg_replace('#[^a-z0-9' . preg_quote($charlist, '#') . ']+#i', '-', $s);
$s = trim($s, '-');
return $s;
}
/**
* Truncates string to maximal length.
* @param string UTF-8 encoding
* @param int
* @param string UTF-8 encoding
* @return string
*/
public static function truncate($s, $maxLen, $append = "\xE2\x80\xA6")
{
if (self::length($s) > $maxLen) {
$maxLen = $maxLen - self::length($append);
if ($maxLen < 1) {
return $append;
} elseif ($matches = self::match($s, '#^.{1,'.$maxLen.'}(?=[\s\x00-/:-@\[-`{-~])#us')) {
return $matches[0] . $append;
} else {
return self::substring($s, 0, $maxLen) . $append;
}
}
return $s;
}
/**
* Indents the content from the left.
* @param string UTF-8 encoding or 8-bit
* @param int
* @param string
* @return string
*/
public static function indent($s, $level = 1, $chars = "\t")
{
return $level < 1 ? $s : self::replace($s, '#(?:^|[\r\n]+)(?=[^\r\n])#', '$0' . str_repeat($chars, $level));
}
/**
* Convert to lower case.
* @param string UTF-8 encoding
* @return string
*/
public static function lower($s)
{
return mb_strtolower($s, 'UTF-8');
}
/**
* Convert to upper case.
* @param string UTF-8 encoding
* @return string
*/
public static function upper($s)
{
return mb_strtoupper($s, 'UTF-8');
}
/**
* Convert first character to upper case.
* @param string UTF-8 encoding
* @return string
*/
public static function firstUpper($s)
{
return self::upper(self::substring($s, 0, 1)) . self::substring($s, 1);
}
/**
* Capitalize string.
* @param string UTF-8 encoding
* @return string
*/
public static function capitalize($s)
{
return mb_convert_case($s, MB_CASE_TITLE, 'UTF-8');
}
/**
* Case-insensitive compares UTF-8 strings.
* @param string
* @param string
* @param int
* @return bool
*/
public static function compare($left, $right, $len = NULL)
{
if ($len < 0) {
$left = self::substring($left, $len, -$len);
$right = self::substring($right, $len, -$len);
} elseif ($len !== NULL) {
$left = self::substring($left, 0, $len);
$right = self::substring($right, 0, $len);
}
return self::lower($left) === self::lower($right);
}
/**
* Returns UTF-8 string length.
* @param string
* @return int
*/
public static function length($s)
{
return strlen(utf8_decode($s)); // fastest way
}
/**
* Strips whitespace.
* @param string UTF-8 encoding
* @param string
* @return string
*/
public static function trim($s, $charlist = " \t\n\r\0\x0B\xC2\xA0")
{
$charlist = preg_quote($charlist, '#');
return self::replace($s, '#^['.$charlist.']+|['.$charlist.']+\z#u', '');
}
/**
* Pad a string to a certain length with another string.
* @param string UTF-8 encoding
* @param int
* @param string
* @return string
*/
public static function padLeft($s, $length, $pad = ' ')
{
$length = max(0, $length - self::length($s));
$padLen = self::length($pad);
return str_repeat($pad, $length / $padLen) . self::substring($pad, 0, $length % $padLen) . $s;
}
/**
* Pad a string to a certain length with another string.
* @param string UTF-8 encoding
* @param int
* @param string
* @return string
*/
public static function padRight($s, $length, $pad = ' ')
{
$length = max(0, $length - self::length($s));
$padLen = self::length($pad);
return $s . str_repeat($pad, $length / $padLen) . self::substring($pad, 0, $length % $padLen);
}
/**
* Reverse string.
* @param string UTF-8 encoding
* @return string
*/
public static function reverse($s)
{
return @iconv('UTF-32LE', 'UTF-8', strrev(@iconv('UTF-8', 'UTF-32BE', $s)));
}
/**
* Generate random string.
* @param int
* @param string
* @return string
*/
public static function random($length = 10, $charlist = '0-9a-z')
{
$charlist = str_shuffle(preg_replace_callback('#.-.#', function($m) {
return implode('', range($m[0][0], $m[0][2]));
}, $charlist));
$chLen = strlen($charlist);
static $rand3;
if (!$rand3) {
$rand3 = md5(serialize($_SERVER), TRUE);
}
$s = '';
for ($i = 0; $i < $length; $i++) {
if ($i % 5 === 0) {
list($rand, $rand2) = explode(' ', microtime());
$rand += lcg_value();
}
$rand *= $chLen;
$s .= $charlist[($rand + $rand2 + ord($rand3[$i % strlen($rand3)])) % $chLen];
$rand -= (int) $rand;
}
return $s;
}
/**
* Splits string by a regular expression.
* @param string
* @param string
* @param int
* @return array
*/
public static function split($subject, $pattern, $flags = 0)
{
set_error_handler(function($severity, $message) use ($pattern) { // preg_last_error does not return compile errors
restore_error_handler();
throw new RegexpException("$message in pattern: $pattern");
});
$res = preg_split($pattern, $subject, -1, $flags | PREG_SPLIT_DELIM_CAPTURE);
restore_error_handler();
if (preg_last_error()) { // run-time error
throw new RegexpException(NULL, preg_last_error(), $pattern);
}
return $res;
}
/**
* Performs a regular expression match.
* @param string
* @param string
* @param int can be PREG_OFFSET_CAPTURE (returned in bytes)
* @param int offset in bytes
* @return mixed
*/
public static function match($subject, $pattern, $flags = 0, $offset = 0)
{
if ($offset > strlen($subject)) {
return NULL;
}
set_error_handler(function($severity, $message) use ($pattern) { // preg_last_error does not return compile errors
restore_error_handler();
throw new RegexpException("$message in pattern: $pattern");
});
$res = preg_match($pattern, $subject, $m, $flags, $offset);
restore_error_handler();
if (preg_last_error()) { // run-time error
throw new RegexpException(NULL, preg_last_error(), $pattern);
}
if ($res) {
return $m;
}
}
/**
* Performs a global regular expression match.
* @param string
* @param string
* @param int can be PREG_OFFSET_CAPTURE (returned in bytes); PREG_SET_ORDER is default
* @param int offset in bytes
* @return array
*/
public static function matchAll($subject, $pattern, $flags = 0, $offset = 0)
{
if ($offset > strlen($subject)) {
return array();
}
set_error_handler(function($severity, $message) use ($pattern) { // preg_last_error does not return compile errors
restore_error_handler();
throw new RegexpException("$message in pattern: $pattern");
});
$res = preg_match_all(
$pattern, $subject, $m,
($flags & PREG_PATTERN_ORDER) ? $flags : ($flags | PREG_SET_ORDER),
$offset
);
restore_error_handler();
if (preg_last_error()) { // run-time error
throw new RegexpException(NULL, preg_last_error(), $pattern);
}
return $m;
}
/**
* Perform a regular expression search and replace.
* @param string
* @param string|array
* @param string|callable
* @param int
* @return string
*/
public static function replace($subject, $pattern, $replacement = NULL, $limit = -1)
{
if (is_object($replacement) || is_array($replacement)) {
if ($replacement instanceof Nette\Callback) {
$replacement = $replacement->getNative();
}
if (!is_callable($replacement, FALSE, $textual)) {
throw new Nette\InvalidStateException("Callback '$textual' is not callable.");
}
set_error_handler(function($severity, $message) use (& $tmp) { // preg_last_error does not return compile errors
restore_error_handler();
throw new RegexpException("$message in pattern: $tmp");
});
foreach ((array) $pattern as $tmp) {
preg_match($tmp, '');
}
restore_error_handler();
$res = preg_replace_callback($pattern, $replacement, $subject, $limit);
if ($res === NULL && preg_last_error()) { // run-time error
throw new RegexpException(NULL, preg_last_error(), $pattern);
}
return $res;
} elseif ($replacement === NULL && is_array($pattern)) {
$replacement = array_values($pattern);
$pattern = array_keys($pattern);
}
set_error_handler(function($severity, $message) use ($pattern) { // preg_last_error does not return compile errors
restore_error_handler();
throw new RegexpException("$message in pattern: " . implode(' or ', (array) $pattern));
});
$res = preg_replace($pattern, $replacement, $subject, $limit);
restore_error_handler();
if (preg_last_error()) { // run-time error
throw new RegexpException(NULL, preg_last_error(), implode(' or ', (array) $pattern));
}
return $res;
}
}
/**
* The exception that indicates error of the last Regexp execution.
*/
class RegexpException extends \Exception
{
static public $messages = array(
PREG_INTERNAL_ERROR => 'Internal error',
PREG_BACKTRACK_LIMIT_ERROR => 'Backtrack limit was exhausted',
PREG_RECURSION_LIMIT_ERROR => 'Recursion limit was exhausted',
PREG_BAD_UTF8_ERROR => 'Malformed UTF-8 data',
5 => 'Offset didn\'t correspond to the begin of a valid UTF-8 code point', // PREG_BAD_UTF8_OFFSET_ERROR
);
public function __construct($message, $code = NULL, $pattern = NULL)
{
if (!$message) {
$message = (isset(self::$messages[$code]) ? self::$messages[$code] : 'Unknown error') . ($pattern ? " (pattern: $pattern)" : '');
}
parent::__construct($message, $code);
}
}
Zerion Mini Shell 1.0