PHP Base64_decode 函式
Sarwan Soomro
2023年1月30日
PHP base64_decode 函式將字串轉換為長純文字，然後與使用者定義值集的主函式一起傳送。
base64_decode() 是 php 的內建函式，最常用於網路上的郵件功能。
函式語法：
string base64_decode( $string, $strict)
它需要兩個引數。
$string- 用於儲存編碼資料，是必須的。$strict- 雖然此引數不像前者那樣是強制性的，但當它設定為TRUE,時，base64_decode 將返回FALSE，前提是它的輸入包含函式字母表以外的資料。否則，無效資料將被自動丟棄。
返回值：
base64 解碼函式在失敗的情況下返回 FALSE，並可能返回二進位制值。
PHP Base64_decode 函式示例程式碼 1
<?php
$string = base64_encode ('Your string values are encoded');
echo "1.Here is the encoded function value in a machine readable format = ".$string ."<br>";
echo "2.The function decodes the formerly encoded string value" ."<br>" .base64_decode($string);
?>
輸出：
1.Here is the encoded function value in a machine readable
format = WW91ciBzdHJpbmcgdmFsdWVzIGFyZSBlbmNvZGVk
2. The function decodes the formerly encoded string value
Your string values are encoded.
示例程式碼顯示了 base64_decode() 函式如何在一個簡單的場景中工作。
為了對編碼資料進行解碼，程式為變數賦值，然後與解碼函式一起使用。
而輸出表明 base64_decode() 如何將資料轉換回使用者可讀格式。
PHP Base64_decode 函式示例程式碼 2
<?php
//The following variable is assigned with a string set
$string = "HELLO--こんにちは--你好";
//string contains bilingual text
//base64 is used to encode the data first into the $enco variable
$enco = base64_encode ($string);
//finally the base64_decode functionis used to decode the encoded value
$deco = base64_decode ($enco);
echo $deco;
?>
輸出：
HELLO--こんにちは--你好
作者： Sarwan Soomro
Sarwan Soomro is a freelance software engineer and an expert technical writer who loves writing and coding. He has 5 years of web development and 3 years of professional writing experience, and an MSs in computer science. In addition, he has numerous professional qualifications in the cloud, database, desktop, and online technologies. And has developed multi-technology programming guides for beginners and published many tech articles.
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