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新手请教PHP怎么批量循环打印出四位数的数字？

WBOY
Release： 2016-06-23 14:00:32
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比如我要打印
0000
0001
0002
0003
......
9999
这样的四位数的数字，请问该用什么方式实现？


回复讨论(解决方案)

for ($i=0; $i < 10000; $i++) { 	echo str_pad($i, 4,'0',STR_PAD_LEFT )."<br />";}
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for ($i=0; $i < 10000; $i++) { 	echo str_pad($i, 4,'0',STR_PAD_LEFT )."<br />";}
Copy after login
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不知道怎么回事，语法有错误~ 

for ($i=0; $i < 10000; $i++) { 	echo str_pad($i, 4,'0',STR_PAD_LEFT )."<br />";}
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是我的问题，已经解决。感谢了！ 

for ($i=0; $i < 10000; $i++) { 	echo str_pad($i, 4,'0',STR_PAD_LEFT )."<br />";}
Copy after login
Copy after login
Copy after login
Copy after login

另外，怎么判断有没有重复的数字，
比如：11，22，333，880，646。只要符号两个数字为相同的话，即为真。

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新手请教PHP怎么批量循环打印出四位数的数字？
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