How to determine whether a string is base64 encoded in PHP

This article mainly shares with you how to use PHP to determine whether a string is base64 encoded. I hope it can help you.

/**
 * 判断字符串是否base64编码
 */
function func_is_base64($str)
{  
    return $str == base64_encode(base64_decode($str)) ? true : false;  
}

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