echo return的意思|示意
回声返回
echo return的用法详解
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Echo and return are two words from the English language which have been used in the programming world.
The word echo is used in programming to display some kind of output. It is typically used in combination with a variable, for example, to output the value of that variable. In some languages, including PHP, echo can also be used to output HTML code.
The word return is used in programming to return a value from a function. In other words, when a function is invoked it executes a set of instructions and then returns a result. This result can be used by the calling code or by another function.
In PHP, echo and return can both be used to output data. However, return can also be used to assign a value to a variable, while echo cannot.
In conclusion, echo is used mainly to output data while return is used to return a value to the calling code. Furthermore, echo cannot be used to assign a value to a variable while return can.
'echo return相关短语
1、 Echo Return Loss 回波损耗
2、 echo return detail 回声返回
3、 pulse echo return loss 脉冲回波损耗
4、 Echo return loss enhancement 回音往返损耗增强
5、 mean echo balance return loss 平均回波平衡返回损耗
6、 Return an echo 响起一声回音
7、 echo balance return loss 回波平衡返程损耗
8、 return echo 回波