/
String.php
333 lines (310 loc) · 11.9 KB
/
String.php
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<?php
/**
* 字符串处理
*
* @package helper
* @author
*/
class Helper_String {
//禁止实例化
final protected function __construct() {
throw new Exception_System(200402, "此类禁止实例化", '');
}
/**
* 按照字长截取多字节字符串，并进行htmlspecialchars处理
* @param string $string
* @param <type> $length
* @param <type> $sublen
* @param <type> $dot
* @param <type> $htmlspecialchars
* @param <type> $encoding
* @return <type>
*/
static public function cnSubStr($string, $length, $sublen, $dot = '...', $htmlspecialchars = false, $encoding = 'utf-8') {
if (mb_strlen($string, $encoding) > $length) {
$string = mb_substr($string, 0, $sublen, $encoding) . $dot;
}
return $htmlspecialchars ? htmlspecialchars($string, ENT_QUOTES) : $string;
}
/**
* 截取多字节字符串，并进行htmlspecialchars处理
* @param string $string
* @param int $length
* @param string $dot
* @param int $htmlspecialchars
* @return string
*/
static public function cnCut($string, $length, $dot = '...', $htmlspecialchars = true) {
if (mb_strwidth($string) > $length) {
$string = mb_strimwidth($string, 0, $length, $dot);
}
return $htmlspecialchars ? htmlspecialchars($string, ENT_QUOTES) : $string;
}
/**
* 按显示字符的宽度截取已经htmlspecialchars后的字符串
* @param type $string
* @param type $length
* @param type $dot
* @return type
*/
static public function cnCutEncoded($string, $length, $dot = '...') {
if (mb_strwidth($string) <= $length) {
return $string;
}
$string = htmlspecialchars_decode($string, ENT_QUOTES);
$string = mb_strimwidth($string, 0, $length, $dot);
return htmlspecialchars($string, ENT_QUOTES);
}
/**
* 对传入的内容标红处理，可能存在多个关键字需要标红则循环处理
*
* @param string $content 内容
* @param string $searKey 标红的对象
* @return string
*/
static public function redTag($content, $sear_key) {
if (in_array($sear_key, array('~', '/'))) {
$sear_key_arr = array($sear_key);
} else {
$sear_key_arr = array_unique(preg_split("/[\s|\/|~]+/", $sear_key));
}
if (count($sear_key_arr) > 0) {
foreach ($sear_key_arr as $v) {
$vv = $v;
if ($vv === true)
continue;
//过滤转义特殊字符
$v_word = array('+', '.', '?', '$', '^', '*', '(', ')', '[', ']', '{', '}');
foreach ($v_word as $vm) {
$vv = str_replace($vm, "\\{$vm}", $vv);
}
$content = self::dealRedTag($content, $vv);
}
}
return $content;
}
/**
* 标红处理
*
* @param string $content 内容
* @param string $searKey 标红的对象
* @return string
*/
static private function dealRedTag($content, $preg_key) {
if (empty($content) || empty($preg_key)) {
return $content;
}
$html_tags = array();
preg_match_all("/<(\S*?)[^>]*>.*?<\/\\1>|<[^>]+>|<sina:link[^>]*>/i", $content, $tmps);
foreach ($tmps[0] as $k => $v) {
array_push($html_tags, array('sTag' => "#tag{$k}#", 'oTag' => $v));
}
if (count($html_tags) > 0) {
foreach ($html_tags as $ht) {
$content = str_replace($ht['oTag'], $ht['sTag'], $content);
}
}
$content = preg_replace("/($preg_key)/i", "<span style='color: red;'>\\1</span>", $content);
$content = str_replace("＃", "#", $content);
$content = preg_replace("/#([^#]+)#/ies", "strip_tags('#\\1#')", $content);
if (count($html_tags) > 0) {
foreach ($html_tags as $ht) {
$content = str_replace($ht['sTag'], $ht['oTag'], $content);
}
}
return $content;
}
/**
* 字符串截取方法
* 支持中英文、全角半角、
*
* @param string $string 要截取的字符串
* @param int $length 截取长度
* @param string $dot 截取后，显示符
* @param string $charset 字符编码
* @return string
*/
public static function truncate($string, $length=50, $dot = '...', $charset='utf-8'){
$strlen = strlen($string);
//$strlen = mb_strwidth($string, $charset);
if($strlen <= $length) return $string;
$string = str_replace(array(' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), array(' ', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), $string);
$strcut = '';
if(strtolower($charset) == 'utf-8'){
$n = $tn = $noc = 0;
while($n < $strlen){
$t = ord($string[$n]);
if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
$tn = 1; $n++; $noc++;
} elseif(194 <= $t && $t <= 223) {
$tn = 2; $n += 2; $noc += 2;
} elseif(224 <= $t && $t <= 239) {
$tn = 3; $n += 3; $noc += 2;
} elseif(240 <= $t && $t <= 247) {
$tn = 4; $n += 4; $noc += 2;
} elseif(248 <= $t && $t <= 251) {
$tn = 5; $n += 5; $noc += 2;
} elseif($t == 252 || $t == 253) {
$tn = 6; $n += 6; $noc += 2;
} else {
$n++;
}
if($noc >= $length) break;
}
if($noc > $length) $n -= $tn;
$strcut = substr($string, 0, $n);
//$strcut = mb_strimwidth($string, 0, $n, "", $charset);
}
else{
$dotlen = strlen($dot);
$maxi = $length - $dotlen - 1;
for($i = 0; $i < $maxi; $i++){
$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
}
}
$strcut = str_replace(array('&', '"', "'", '<', '>'), array('&', '"', ''', '<', '>'), $strcut);
return $strcut.$dot;
}
/**
* HTML标签闭合
*
* @param string $html 输入HTML
* @param boolean $suto_span 纯JS时是否自动套空SPAN，避免SCRIPT被过滤的问题
*
* @return string 处理后的HTML
*/
static public function tidy($html, $auto_span=true) {
if(!extension_loaded('tidy')) {
if(function_exists('dl')) {
Helper_Debug::error('Tidy is not loaded, try to dl.');
dl('tidy.so');
} else {
throw new Exception_System(200107, 'PHP extension tidy not loaded.', array());
}
}
$html = trim($html);
if($auto_span && stripos($html, '<script') === 0 && stripos($html, '</script>') === (strlen($html)-9)) {
$html = '<span>'.$html.'</span>';
}
return tidy_repair_string($html, array('output-xhtml' => true, 'show-body-only' => true, 'input-encoding' => 'utf8', 'output-encoding' => 'utf8', 'char-encoding' => 'utf8'), 'utf8');
}
/**
* 去掉最右边的URL
* @param string $text
* @param string $link_prefix 链接前缀(支持正则表过式)
* @return type
*/
static public function cutRightUrl($text, $link_prefix = '详情:') {
return preg_replace("~\s*{$link_prefix}https?://[a-z0-9A-Z/?.]+$~", '', $text);
}
/**
* 检查字符串中是否有空白
* @param type $text
* @return boolean
*/
static public function hasGap($text) {
return (boolean)preg_match('/\s/', $text);
}
/**
* 判断一个字符串是否包含4个字节的utf8字符
*
* @param string $text 要检测的字符串
* @return int 1.包含；0.不包含
*/
static public function isUtf8mb4($text) {
return preg_match('/[\xF0-\xFF]/', $text);
}
/**
* 中文分词
*
* @param string $content
* @param enum $mode 分词的规则,enum(SCWS_MULTI_SHORT, SCWS_MULTI_DUALITY, SCWS_MULTI_ZMAIN, SCWS_MULTI_ZALL)
* 分别表示短语，二元，主要单字，所有单字
*
* @return array $splits 包含被分的词的数组
*/
public static function cnSplit($content, $mode=SCWS_MULTI_ZALL) {
if (empty($content) || !function_exists('scws_new')) {
return $content;
}
$ws_obj = scws_new();
$ws_obj->set_charset('utf8');
$ws_obj->send_text($content);
$ws_obj->set_multi($mode);
$splits = array();
while($tmp=$ws_obj->get_result()) {
foreach ($tmp as $each) {
$splits[] = $each['word'];
}
}
$ws_obj->close();
return $splits;
}
/**
* 过滤ascii码的所有特殊字符
*
* @param string $str
* @param string $replace 过滤掉的ascii码的替代字符
*
* @return string $rst
*/
public static function escapeAsciiSpecAll($str, $replace='') {
return preg_replace("/([\\x00-\\x1f\\x21-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\x7f]+)/i", $replace, $str);
}
/**
* 转化全角空格为半角，\n,\r为空格，合并多个空格为1一个，把全角@转成半角@
* 这个是发微博的需求
*
* @param string $str
*
* @return string
*/
public static function trimAllBlank($str) {
$str = str_replace(array(" ", "\n", "\r"), " ", $str);
$str = preg_replace("/[ ]{1,}/", " ", $str);
$str = str_replace('＠', '@', $str);
return $str;
}
/**
* 计算字符串的长度 [yanzhong@20130116]
* [注] 常用于DB字段长度判断,如:varchar(255),代表存255个字符，可为255汉字，可为255英文，也存在混杂情况。
*
* @param string $string string
* @return int ($zhStr = '您好,中国!', $len = 6; $str = 'Hello,中国！'; $len=9)
*/
public static function utf8_strlen($string = null) {
// 将字符串分解为单元
preg_match_all('/./us', $string, $match);
// 返回单元个数
return count($match[0]);
}
/**
*
*
* @param type $content
* @return type
*/
public static function checkStatusLength($content, $max = 140) {
$min = 41;
$surl = 20;
$urlCount = 0;
preg_match_all("/http:\/\/[a-zA-Z0-9]+(\.[a-zA-Z0-9]+)+([-A-Z0-9a-z_\$\.\+\!\*\(\)\/,:;@&=\?\~\#\%]*)*/i", $content, $urls);
foreach ($urls[0] as $url) {
$count = mb_strwidth($url, 'UTF-8');
if (preg_match('/^(http:\/\/t.cn)/', $url)) {
continue;
}else {
if (preg_match('/^(http:\/\/)+(t.sina.com.cn|t.sina.cn)/', $url) || preg_match('/^(http:\/\/)+(weibo.com|weibo.cn)/', $url)) {
//本域的小于41字符按照实际值算，大于41小于等于140以20字符算，超过140为20加溢出长度
$urlCount += $count <= $min ? $count : ($count <= $max ? $surl : ($count - $max + $surl));
}else {
//非本域的小于140的按照20算，超过140为20加溢出长度
$urlCount += $count <= $max ? $surl : ($count - $max + $surl);
}
}
$content = str_replace($url, "", $content);
}
$result = ceil(($urlCount + mb_strwidth($content, 'UTF-8')) / 2);
return $result;
}
}