示例1:单引号之间的变量

如果使用单引号，则引号之间的所有内容将始终被视为字符串的一部分.

If you use single quotes everything between them will always be treated as part of the string.

$ output.='< div class ="tab-pane" id ='.$ type.'">;

示例2:双引号之间的变量(选项1)

如果您有一个要传递给字符串的变量，则可以使用双引号将其放入其中，而de variable是接触"其他单词.它应该始终有空格.

If you have a variable that you want to pass in a string you can just put it in there if you use double quotes and de variable is nog 'touching' the other words. It should always have spaces.

$output .= "<p>i would like to $your_text_here with you.</p>";

示例3:将字符串中的引号转义

可以通过在要转义的字符之前使用\(反斜杠)来转义字符串中的字符.

Escaping characters in a string can be done by using a \ (backslash) before the character you want to escape.

$output .= "<div class=\"tab-pane\" id=\"example-id\">";

示例4:双引号之间的变量，且其旁边没有空格

如果使用双引号(选项2)，则可以将变量放在{}大括号之间

You can place your variable between {} braces if you use double quotes (option 2)

$output .= "<div class=\"tab-pane\" id=\"{$type}\">";

但是，将PHP变量与字符串文字混合