vendor/codeages/biz-framework/src/Utility/Str.php

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<?php

namespace Codeages\Biz\Framework\Utility;

/**
 * 字符串工具类
 *
 * 这个类的代码Copy自 Laravel Framework 的 Illuminate\Support\Str
 * 参见：https://github.com/laravel/framework/blob/5.5/src/Illuminate/Support/Str.php
 */
class Str
{
    /**
     * The cache of snake-cased words.
     *
     * @var array
     */
    protected static $snakeCache = array();

    /**
     * The cache of camel-cased words.
     *
     * @var array
     */
    protected static $camelCache = array();
    /**
     * The cache of studly-cased words.
     *
     * @var array
     */
    protected static $studlyCache = array();

    /**
     * Convert a value to camel case.
     *
     * @param string $value
     *
     * @return string
     */
    public static function camel($value)
    {
        if (isset(static::$camelCache[$value])) {
            return static::$camelCache[$value];
        }

        return static::$camelCache[$value] = lcfirst(static::studly($value));
    }

    /**
     * Return the length of the given string.
     *
     * @param string $value
     * @param string $encoding
     *
     * @return int
     */
    public static function length($value, $encoding = null)
    {
        if ($encoding) {
            return mb_strlen($value, $encoding);