$gen_previous = "Previous";
$gen_next = "Next";
$gen_jumptopage = "Jump to page %1\$s of %2\$d";
$gen_resultinfo = "Viewing %1\$d-%2\$d of %3\$d messages";
$gen_loading = "Loading...";define( "PVM_MSGSTORE_ASF_STRING", "Showing %1$d-%2%d of %3d" );以上是一个PHP脚本文件,我在里面发现一些奇怪的参数写法。http://php.net/manual/en/function.sprintf.php
根据这个文档里的例子3:Example #3 Argument swapping
<?php
$format = 'The %2$s contains %1$d monkeys'; //PHP文档里的写法
printf($format, $num, $location);
?><?php
$format = 'The %2\$s contains %1\$d monkeys'; //嵌入斜杠
printf($format, $num, $location);
?>我的问题是如果在参数中加一个斜杠,对输出的结果有影响吗?这种加斜杠参数的写法合法吗?
我手头没有PHP程序,有哪位高手能实际跑一下这个printf语句,告诉我结果吗?谢谢。
$gen_next = "Next";
$gen_jumptopage = "Jump to page %1\$s of %2\$d";
$gen_resultinfo = "Viewing %1\$d-%2\$d of %3\$d messages";
$gen_loading = "Loading...";define( "PVM_MSGSTORE_ASF_STRING", "Showing %1$d-%2%d of %3d" );以上是一个PHP脚本文件,我在里面发现一些奇怪的参数写法。http://php.net/manual/en/function.sprintf.php
根据这个文档里的例子3:Example #3 Argument swapping
<?php
$format = 'The %2$s contains %1$d monkeys'; //PHP文档里的写法
printf($format, $num, $location);
?><?php
$format = 'The %2\$s contains %1\$d monkeys'; //嵌入斜杠
printf($format, $num, $location);
?>我的问题是如果在参数中加一个斜杠,对输出的结果有影响吗?这种加斜杠参数的写法合法吗?
我手头没有PHP程序,有哪位高手能实际跑一下这个printf语句,告诉我结果吗?谢谢。
<?phpecho $gen_previous = "Previous";
echo "<br/>";
echo $gen_next = "Next";
echo "<br/>";
echo $gen_jumptopage = "Jump to page %1\$s of %2\$d";
echo "<br/>";
echo $gen_resultinfo = "Viewing %1\$d-%2\$d of %3\$d messages";
echo "<br/>";
echo $gen_loading = "Loading...";
echo "<br/>";define( "PVM_MSGSTORE_ASF_STRING", "Showing %1$d-%2%d of %3d" );
echo PVM_MSGSTORE_ASF_STRING;
echo "<br/>";$format = 'The %2$s contains %1$d monkeys'; //PHP文档里的写法
printf($format, $num, $location);
echo "<Br/>";
$format = 'The %2\$s contains %1\$d monkeys'; //嵌入斜杠
printf($format, $num, $location);
/*
Previous
Next
Jump to page %1$s of %2$d
Viewing %1$d-%2$d of %3$d messages
Loading...
Showing %1-%2%d of %3d
The contains 0 monkeys
The $s contains $d monkeys
*/
?>
$gen_jumptopage = "Jump to page %1\$s of %2\$d";$format = 'Jump to page %1\$s of %2\$d'; //嵌入斜杠
printf($page, $pages)结果就是 “Jump to page %1\$s of %2\$d” ???
$location='tree';$format='The %2$s contains %1$d monkey'."\n";
printf($format,$num,$location);$format="The %2$s contains %1$d monkey\n";
printf($format,$num,$location);$format="The %2\$s contains %1\$d monkey\n";
printf($format,$num,$location);
注意单双引号!
上面的结果为:
The tree contains 3 monkey
The contains monkey
The tree contains 3 monkey