php 0 empty
http://php.net/empty. The following things are considered to be empty: "" (an empty string); 0 (0 as an integer); 0.0 (0 as a float); "0" (0 as a string) ..., 常常在判斷數值是產生疑惑，什麼時候用empty()，什麼時候用isset()， ... empty() 能判斷值的範圍比 isset() 還多，能多判斷 '' [] true false 0 '0' 等。
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 php 0 empty 相關參考資料
empty - Manual - PHP
Example #1 A simple empty() / isset() comparison. <?php $var = 0; // Evaluates to true because $var is empty if (empty($var)) echo '$var is either 0, empty, ... https://www.php.net In php, is 0 treated as empty? - Stack Overflow
http://php.net/empty. The following things are considered to be empty: "" (an empty string); 0 (0 as an integer); 0.0 (0 as a float); "0" (0 as a string) ... https://stackoverflow.com PHP empty() 和isset() 差別· Clouding City 克勞丁城市
常常在判斷數值是產生疑惑，什麼時候用empty()，什麼時候用isset()， ... empty() 能判斷值的範圍比 isset() 還多，能多判斷 '' [] true false 0 '0' 等。 https://clouding.city PHP isset()和empty()的區別@ 史丹利愛碎念:: 痞客邦::
PHP isset()和empty()的區別寫程式過程中，經常會用到判斷函數isset() ... 變數存在，且值為0，則TRUE，無論是不是用字串("0")的形式去定義，都 ... https://newaurora.pixnet.net php: '0' as a string with empty() - Stack Overflow
You cannot make it. That is how it was designed. Instead you can write an and statement to test: if (empty($var) && $var !== '0') echo $var . https://stackoverflow.com [PHP] empty(),is_null(),isset 判斷結果列表 - 謝晒的PHP網頁設計
寫PHP常常會用empty 或isset 等函式去判斷某些變數是否存在，這類函式很類似，但實際上有些許的不同，在PHP官網上特別針對類似功能的函式， ... http://seanphpbook.blogspot.co [鐵人賽Day11]在PHP中isset、empty、is_null的使用差別- iT 邦 ...
(參考資料：http://php.net/manual/en/function.empty.php) ... echo "<br />"; echo "設定value1值為0<hr />"; $value1="0"; check($value1); ?>. https://ithelp.ithome.com.tw |