101 lines
3.3 KiB
PHP
101 lines
3.3 KiB
PHP
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<?php
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namespace common\helpers;
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/**
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* StringHelper
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*
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*/
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class StringHelper extends \yii\helpers\StringHelper{
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/**
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* 字符串截取，支持中文和其他编码
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* @param string $str 需要转换的字符串
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* @param string $start 开始位置
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* @param string $length 截取长度
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* @param string $charset 编码格式
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* @param string $suffix 截断显示字符
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* @return string
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*/
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public static function substr($str, $start=0, $length, $charset="utf-8", $suffix=false) {
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if(function_exists("mb_substr"))
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$slice = mb_substr($str, $start, $length, $charset);
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elseif(function_exists('iconv_substr')) {
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$slice = iconv_substr($str,$start,$length,$charset);
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if(false === $slice) {
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$slice = '';
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}
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}else{
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$re['utf-8'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";
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$re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";
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$re['gbk'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";
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$re['big5'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";
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preg_match_all($re[$charset], $str, $match);
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$slice = join("",array_slice($match[0], $start, $length));
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}
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return $suffix ? $slice.'...' : $slice;
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}
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/**
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* 获取随机字符串
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*
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* @param $length
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* @param bool $numeric
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* @return string
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*/
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public static function random($length, $numeric = false)
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{
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$seed = base_convert(md5(microtime() . $_SERVER['DOCUMENT_ROOT']), 16, $numeric ? 10 : 35);
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$seed = $numeric ? (str_replace('0', '', $seed) . '012340567890') : ($seed . 'zZ' . strtoupper($seed));
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$hash = '';
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if (!$numeric) {
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$hash = chr(rand(1, 26) + rand(0, 1) * 32 + 64);
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$length--;
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}
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$max = strlen($seed) - 1;
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$seed = str_split($seed);
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for ($i = 0; $i < $length; $i++) {
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$hash .= $seed[mt_rand(0, $max)];
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}
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return $hash;
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}
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/**
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* 和谐显示
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* 如：手机号13812345678变成138****5678
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*
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* @param $string
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* @return string
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*/
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public static function string_hide_cut($string): string
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{
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$length = mb_strlen($string, 'utf-8');
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if ($length == 0) {
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return '';
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}
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if ($length == 11) {
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$firstStr = mb_substr($string, 0, 3, 'utf-8');
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$lastStr1 = mb_substr($string, -4, 1, 'utf-8');
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$lastStr2 = mb_substr($string, -1, 1, 'utf-8');
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return $firstStr . '****' . $lastStr1 . '**' . $lastStr2;
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} elseif ($length < 11 && $length >= 3) {
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$firstStr = mb_substr($string, 0, 1, 'utf-8');
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$lastStr = mb_substr($string, -1, 1, 'utf-8');
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return $firstStr . str_repeat('*', $length - 2) . $lastStr;
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} elseif ($length == 2) {
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$firstStr = mb_substr($string, 0, 1, 'utf-8');
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return $firstStr . '*';
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} elseif ($length == 1) {
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return $string . '*';
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} else {
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$firstStr = mb_substr($string, 0, 3, 'utf-8');
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$lastStr = mb_substr($string, -4, 2, 'utf-8');
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return $firstStr . str_repeat('*', mb_strlen($string, 'utf-8') - 5) . $lastStr . '**';
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}
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}
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}
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