blocks|key|2543181|text|$firstChar+=+'a';
$secondChar+=+'z';

$distance+=+abs(+ord($firstChar)+-+ord($secondChar)+);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2543182|你在找这样的东西吗？ord返回字符的ascii代码，我们使用abs来补偿负距离，或者您可以保留此操作的符号以了解它们的不同方式(如果第一个大于还是小于第二个)，这取决于您想要实现什么。|unstyled|2543183|编辑|offset|length|style|BOLD|2543184|function+letterDistance($a,+$b){
++++$alphLetterCount+=+ord('z')+-+ord('a');

++++$distance+=+ord(strtolower($b))+-+ord(strtolower($a));

++++return+($distance+<+0+?+$alphLetterCount+%2B+$distance+:+$distance-1);
}|2543185|这个函数的工作原理与OP想要的从'z‘到'b’是1，从'b‘到'z’的距离是23一样，它也是不区分大小写的。|2543186|entityMap^0|0|0|0|2|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|U|8|@$I|V|J|W|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$B|C]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|F|7|Z|8|@]|9|@]|A|$]]]|R|$]]

<pre><code>$firstChar = 'a';
$secondChar = 'z';

$distance = abs( ord($firstChar) - ord($secondChar) );
</code></pre>

are you looking for something like this? ord returns ascii code for character, we use abs to compensate for negative distance, or you can keep sign of this operation to know which way they differ (if first is bigger or smaller than second), depends what you want to achieve

EDIT

<pre><code>function letterDistance($a, $b){
 $alphLetterCount = ord('z') - ord('a');

 $distance = ord(strtolower($b)) - ord(strtolower($a));

 return ($distance &lt; 0 ? $alphLetterCount + $distance : $distance-1);
}
</code></pre>

this function works exactly as OP wanted to - distance from 'z' to 'b' is 1 and from 'b' to 'z' is 23, it's also case insensitive

blocks|key|2543191|text|只需在php中使用ord()函数并获得char的int值。像这样用它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2543192|function+str_distance($a,+$b){
++++return+ord($b)+-+ord($a);
}

echo+str_distance('a',+'c')+-+1;|code-block|syntax|javascript|2543193|`|2543194|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Simply use ord() function in php and get the int value of char.
use it like this
`

<pre><code>function str_distance($a, $b){
 return ord($b) - ord($a);
}

echo str_distance('a', 'c') - 1;
</code></pre>

`

blocks|key|3957829|text|好吧，这听起来可能有点傻，但我很无聊：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3957830|return+count(array_diff(range($a,+$b),+[$a,+$b]));|code-block|syntax|javascript|3957831|创建从$a到$b的范围|unordered-list-item|offset|length|style|CODE|3957832|得到范围与两个字符$a和$b之间的差异|3957833|数差额|3957834|entityMap^0|0|0|3|2|6|2|0|9|2|C|2|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|I|7|V|8|@$J|W|K|X|L|M]|$J|Y|K|Z|L|M]]|9|@]|A|$]]|$1|N|3|O|5|I|7|10|8|@$J|11|K|12|L|M]|$J|13|K|14|L|M]]|9|@]|A|$]]|$1|P|3|Q|5|I|7|15|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|S|$]]

OK, this might seem a little bit stupid, but I'm bored:

<pre><code>return count(array_diff(range($a, $b), [$a, $b]));
</code></pre>

<ul>
<li>Create a range from <code>$a</code> to <code>$b</code></li>
<li>Get the difference between the range and the 2 characters <code>$a</code> and <code>$b</code></li>
<li>Count the difference</li>
</ul>

blocks|key|2543307|text|function+Letter_Distance($x,$y){
++++$L1+=+strtolower($x);
++++$L2+=+strtolower($y);
++++$alphabet+=+array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");
++++$pos1+=+array_search($L1,+$alphabet);
++++$pos2+=+array_search($L2,+$alphabet);
++++return+abs(($pos1+-+$pos2))+-+1;
}

echo+Letter_Distance("a","c");|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2543308|1|blockquote|2543309|希望这有帮助，随时调整它。|unstyled|2543310|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|N|8|@]|9|@]|A|$]]|$1|J|3|-4|5|I|7|O|8|@]|9|@]|A|$]]]|K|$]]

<pre><code>function Letter_Distance($x,$y){
 $L1 = strtolower($x);
 $L2 = strtolower($y);
 $alphabet = array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");
 $pos1 = array_search($L1, $alphabet);
 $pos2 = array_search($L2, $alphabet);
 return abs(($pos1 - $pos2)) - 1;
}

echo Letter_Distance("a","c");
</code></pre>

<blockquote>
 1
</blockquote>

Hope this helps, feel free to tweak it.

blocks|key|3957865|text|我希望函数在从Z到A时更喜欢用-符号返回，同时也要注意低跳|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3957866|private+function+str_distance($start,$finish)
{
+++return+ord(lcfirst($finish))+-+ord(lcfirst($start));
}
+++//str_distance('a','z')+=>+25
+++//str_distance('Z','A')+=>+-25|code-block|syntax|javascript|3957867|entityMap^0|F|1|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

I'd like the function prefer to return with <code>-</code> sign when going from Z to A and also takes care of lowercasing

<pre><code>private function str_distance($start,$finish)
{
 return ord(lcfirst($finish)) - ord(lcfirst($start));
}
 //str_distance('a','z') =&gt; 25
 //str_distance('Z','A') =&gt; -25
</code></pre>

blocks|key|2543326|text|递归版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2543327|function+str_distance($a,+$b,+$c+=+0)+{
++++if+($a+>+$b)+return+str_distance($b,+$a,+$c);
++++if+(%2B%2B$a+>=+$b)+return+$c;
++++return+str_distance($a,+$b,+%2B%2B$c);
}|code-block|syntax|javascript|2543328|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Recursive version:

<pre><code>function str_distance($a, $b, $c = 0) {
 if ($a &gt; $b) return str_distance($b, $a, $c);
 if (++$a &gt;= $b) return $c;
 return str_distance($a, $b, ++$c);
}
</code></pre>

Is there a built in function that can calculate the distance between 2 chars? for example:

if i want to calculate the distance between <code>a</code> and <code>c</code> the result should be <code>1</code> because there is one letter in between <code>a</code> and <code>c</code>.

I did a function to achieve that, but i need to know if there is a built in solution or a simpler one 

<pre><code>function str_distance($a, $b){
 $cant = 0;
 while(true){
 if (++$a == $b)
 return $cant;
 $cant++;
 }
}
</code></pre>

But this wont work when calculating <code>z</code> to <code>b</code> or any calculations that gets to the end of the alphabet.

Any suggestions?

Calculate Distance between two chars

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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是否有一个内置函数可以计算两个字符之间的距离？例如：如果我想计算a和c之间的距离，结果应该是1，因为a和c之间有一个字母。我做了一个函数来实现这一点，但是我需要知道是否有一个内置的解决方案或一个简单的解决方案。function str_distance($a, $b){    $cant = 0;    while(true){        if (++$a == $b)            

问计算两个字符之间的距离
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