Namespace declaration statement has to be the very first statement in the script
php 中
Namespace declaration statement has to be the very first statement in the script 錯誤解決方法：
在PHP文件中編寫有namespace 時候提示此錯誤，應該將 <?php 開始前面不能有語句，空行也不行。
如果是在含有<html>語言的混合php 文件裏面，且文件裏面至少有一個<?php ?>代碼段時候，只要用到namespace,該文件的首行必須以<?php開頭.
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Namespace declaration statement has to be the very first statement in the script
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