我将所有单词大写，然后将a、的、和等单词小写。第一个和最后一个单词应该保持大写。我尝试使用's而不是''b，这导致了一些奇怪的问题。我也试过[^$]，但这似乎并不意味着"不是字符串的末尾"
function titleize($string){
return ucfirst(
preg_replace("/'b(A|Of|An|At|The|With|In|To|And|But|Is|For)'b/uie",
"strtolower('$1')",
ucwords($string))
);
}
这是我试图修复的唯一一个失败的测试。末尾的"in"应保持大写。
titleize("gotta give up, gotta give in");
//Gotta Give Up, Gotta Give In
这些测试通过：
titleize('if i told you this was killing me, would you stop?');
//If I Told You This Was Killing Me, Would You Stop?
titleize("we're at the top of the world (to the simple two)");
//We're at the Top of the World (to the Simple Two)
titleize("and keep reaching for those stars");
//And Keep Reaching for Those Stars
在将字符串发送到regex replace之前应用ucwords()，然后在从regex返回之后再次应用ucfirst（用于出现在字符串开头的单词）。这可以通过约定缩短，即字符串开头和结尾的每个单词都不被空格包围。使用这个约定，我们可以使用类似'/(?<='s)( ... )(?='s)/'的正则表达式。这将以某种方式简化您的功能：
function titleize2($str) {
$NoUc = Array('A','Of','An','At','The','With','In','To','And','But','Is','For');
$reg = '/(?<='s)(' # set lowercase only if surrounded by whitespace
. join('|', $NoUc) # add OR'ed list of words
. ')(?='s)/e'; # set regex-eval mode
return preg_replace( $reg, 'strtolower("''1")', ucwords($str) );
}
如果使用进行测试
...
$Strings = Array('gotta give up, gotta give in',
'if i told you this was killing me, would you stop?',
'we''re at the top of the world (to the simple two)',
'and keep reaching for those stars');
foreach ($Strings as $s)
print titleize2($s) . "'n";
...
这将返回正确的结果。
试试这个正则表达式：
/'b(A|Of|An|At|The|With|In|To|And|But|Is|For)(?!$)'b/uie
负前瞻(?!$)排除了后面跟着endofrine的匹配。
为行(?!$)的末尾添加一个负前瞻应该可以实现
function titleize($string){
return ucfirst(
preg_replace("/'b(A|Of|An|At|The|With|In|To|And|But|Is|For)'b(?!$)/uie",
"strtolower('$1')",
ucwords(inflector::humanize($string)))
);
}