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单引号与双引号的区别:单引号内部的变量不会执行双引号会执行如$name = ‘hello‘;echo "the $name";会输出 the hello而如果是单引号$name = ‘hello‘;echo ‘the $name‘;会输出 the $name
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原文地址:http://www.cnblogs.com/Yfling/p/5971688.html