WebMay 7, 2024 · 1、echo — Output one or more strings(输出一个或者多个字符串). 3、print_r — 打印关于变量的易于理解的信息(手册上是这样说的: print_r () string 、 integer 或 ,将打印变量值本身。. 如果给出的是 array ,将会按照一定格式显示键和元素。. object 与数组类似。. ). 4 ... WebApr 11, 2007 · Dave felt that rather than trying to solve the echo dichotomy, he would leave "echo" alone and go with "print" which was his own creation. "print" would be the same everywhere. And he added a lot of new stuff to "print". Later, Posix decreed that the USG echo was standard. And it defined "printf" as a new, more powerful tool.
exit(0)和return 0区别 - CSDN文库
WebJun 23, 2024 · 例:# printf "The year is 2016.\nToday is 7.\n". The year is 2016. Today is 7. 三、区别:. (1)首先echo是回显,即代表回车显示,是自带换行的;而printf只是打印出来,没有换行. (2)echo只是回显没有变量替换功能;printf是有的. 举例:假如我们定义好变量a='hello world'. 则 echo ... kings wild project luxury playing cards
syntax - php : echo"", print(), printf() - Stack Overflow
WebApr 11, 2024 · 38. There are 2 differences between echo and print in PHP: print returns a value. It always returns 1. echo can take a comma delimited list of arguments to output. Always returning 1 doesn't seem particularly useful. And a comma delimited list of arguments can be simulated with multiple calls or string concatenation. WebJun 20, 2024 · 我们很容易知道的echo和printf的区别在于echo自带回车,而printf需要手动加\n,但是今天我发现了更深层次的区别。. 今天刚开始学习shell编程。. 用shell可以编写sh文件,是一种可以在 linux 中运行的脚本。. 学习的地址是菜鸟教程,网址如下:. 在 … Web同时,echo函数并不需要圆括号,所以echo函数更像是语句而不像是函数。在php代码编写时,我比较喜欢使用echo()来输出字符串,不过我也发现有很多人会使用print()函数来输出字符串。我一直比较不明白,使用echo()和print()到底有什么区别呢? lying in a hammock james wright