[英]Capitalize last letter of a string
How can I capitalize only the last letter of a string. 如何只将字符串的最后一个字母大写。
For example: 例如:
hello
becomes: 变为:
hellO
Convoluted but fun: 令人困惑但有趣:
echo strrev(ucfirst(strrev("hello")));
Demo: http://ideone.com/7QK5B 演示: http : //ideone.com/7QK5B
as a function: 作为一个功能:
function uclast($str) {
return strrev(ucfirst(strrev($str)));
}
When $s
is your string ( Demo ): 当$s
是你的字符串( Demo )时:
$s[$l=strlen($s)-1] = strtoupper($s[$l]);
Or in form of a function: 或者以函数的形式:
function uclast($s)
{
$l=strlen($s)-1;
$s[$l] = strtoupper($s[$l]);
return $s;
}
And for your extended needs to have everything lower-case except the last character explicitly upper-case: 并且为了您的扩展需求,除了最后一个字符明确大写之外,所有内容都是小写的:
function uclast($s)
{
$l=strlen($s)-1;
$s = strtolower($s);
$s[$l] = strtoupper($s[$l]);
return $s;
}
There are two parts to this. 这有两个部分。 First, you need to know how to get parts of strings. 首先,您需要知道如何获取字符串的一部分。 For that, you need the substr()
function. 为此,您需要substr()
函数。
Next, there is a function for capitalizing a string called strtotupper()
. 接下来,有一个函数用于大写一个名为strtotupper()
的字符串。
$thestring="Testing testing 3 2 1. aaaa";
echo substr($thestring, 0, strlen($thestring)-2) . strtoupper(substr($thestring, -1));
Lowercase / uppercase / mixed character case for everything following can be used 可以使用以下所有内容的小写/大写/混合字符大小写
<?php
$word = "HELLO";
//or
$word = "hello";
//or
$word = "HeLLo";
$word = strrev(ucfirst(strrev(strtolower($word))));
echo $word;
?>
Output for all words 所有单词的输出
hellO
$string = 'ana-nd';
echo str_replace(substr($string, -3), strtoupper('_'.substr($string, -2)), $string);
// Output: ana_ND
$string = 'anand';
echo str_replace(substr($string, -2), strtoupper(substr($string, -2)), $string);
// Output: anaND
Here's an algorithm: 这是一个算法:
1. Split the string s = xyz where x is the part of
the string before the last letter, y is the last
letter, and z is the part of the string that comes
after the last letter.
2. Compute y = Y, where Y is the upper-case equivalent
of y.
3. Emit S = xYz
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