<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: yunwuxin <448901948@qq.com>
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// +----------------------------------------------------------------------
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namespace think\helper;
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class Str
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{
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protected static $snakeCache = [];
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protected static $camelCache = [];
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protected static $studlyCache = [];
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/**
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* 检查字符串中是否包含某些字符串
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* @param string $haystack
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* @param string|array $needles
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* @return bool
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*/
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public static function contains($haystack, $needles)
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{
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foreach ((array) $needles as $needle) {
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if ($needle != '' && mb_strpos($haystack, $needle) !== false) {
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return true;
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}
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}
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return false;
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}
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/**
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* 检查字符串是否以某些字符串结尾
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*
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* @param string $haystack
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* @param string|array $needles
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* @return bool
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*/
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public static function endsWith($haystack, $needles)
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{
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foreach ((array) $needles as $needle) {
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if ((string) $needle === static::substr($haystack, -static::length($needle))) {
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return true;
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}
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}
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return false;
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}
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/**
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* 检查字符串是否以某些字符串开头
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*
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* @param string $haystack
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* @param string|array $needles
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* @return bool
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*/
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public static function startsWith($haystack, $needles)
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{
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foreach ((array) $needles as $needle) {
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if ($needle != '' && mb_strpos($haystack, $needle) === 0) {
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return true;
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}
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}
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return false;
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}
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/**
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* 获取指定长度的随机字母数字组合的字符串
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*
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* @param int $length
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* @return string
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*/
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public static function random($length = 16)
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{
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$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
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return static::substr(str_shuffle(str_repeat($pool, $length)), 0, $length);
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}
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/**
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* 字符串转小写
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*
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* @param string $value
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* @return string
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*/
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public static function lower($value)
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{
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return mb_strtolower($value, 'UTF-8');
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}
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/**
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* 字符串转大写
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*
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* @param string $value
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* @return string
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*/
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public static function upper($value)
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{
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return mb_strtoupper($value, 'UTF-8');
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}
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/**
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* 获取字符串的长度
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*
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* @param string $value
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* @return int
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*/
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public static function length($value)
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{
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return mb_strlen($value);
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}
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/**
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* 截取字符串
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*
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* @param string $string
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* @param int $start
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* @param int|null $length
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* @return string
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*/
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public static function substr($string, $start, $length = null)
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{
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return mb_substr($string, $start, $length, 'UTF-8');
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}
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/**
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* 驼峰转下划线
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*
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* @param string $value
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* @param string $delimiter
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* @return string
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*/
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public static function snake($value, $delimiter = '_')
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{
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$key = $value;
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if (isset(static::$snakeCache[$key][$delimiter])) {
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return static::$snakeCache[$key][$delimiter];
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}
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if (!ctype_lower($value)) {
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$value = preg_replace('/\s+/u', '', $value);
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$value = static::lower(preg_replace('/(.)(?=[A-Z])/u', '$1' . $delimiter, $value));
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}
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return static::$snakeCache[$key][$delimiter] = $value;
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}
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/**
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* 下划线转驼峰(首字母小写)
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*
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* @param string $value
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* @return string
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*/
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public static function camel($value)
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{
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if (isset(static::$camelCache[$value])) {
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return static::$camelCache[$value];
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}
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return static::$camelCache[$value] = lcfirst(static::studly($value));
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}
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/**
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* 下划线转驼峰(首字母大写)
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*
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* @param string $value
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* @return string
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*/
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public static function studly($value)
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{
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$key = $value;
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if (isset(static::$studlyCache[$key])) {
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return static::$studlyCache[$key];
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}
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$value = ucwords(str_replace(['-', '_'], ' ', $value));
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return static::$studlyCache[$key] = str_replace(' ', '', $value);
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}
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/**
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* 转为首字母大写的标题格式
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*
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* @param string $value
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* @return string
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*/
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public static function title($value)
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{
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return mb_convert_case($value, MB_CASE_TITLE, 'UTF-8');
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}
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}
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