Home Backend Development PHP Tutorial PHP中的一些边角料

PHP中的一些边角料

Jun 23, 2016 pm 01:27 PM

关于换行

PHP 会在输出时自动删除其结束符?>后的一个换行。该功能主要是针对在一个页面中嵌入多段 PHP 代码或者包含了无实质性输出的 PHP 文件而设计,与此同时也造成了一些疑惑。如果需要在 PHP 结束符?>之后输出换行的话,可以在其后加一个空格,或者在最后的一个 echo/print 语句中加入一个换行。

关于结束标记

如果文件内容是纯 PHP 代码,最好在文件末尾删除 PHP 结束标记。这可以避免在 PHP 结束标记之后万一意外加入了空格或者换行符,会导致 PHP 开始输出这些空白,而脚本中此时并无输出的意图。

关于指令分隔符

PHP 代码段中的最后一行可以不用分号结束。

<?php echo "This is a test" ?># 多行的情况<?phpecho 123 // 123?>
Copy after login
持续更新……

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