[英]Get the difference between two strings
我正在创建一个通配符搜索/替换函数,需要找到两个字符串之间的差异。 我已经尝试了一些像array_diff
和preg_match
这样的函数,浏览了我的方式~10个谷歌页面没有解决方案。
我现在有一个简单的解决方案,但希望在通配符之前实现对未知值的支持
这是我得到的:
function wildcard_search($string, $wildcard) {
$wildcards = array();
$regex = "/( |_|-|\/|-|\.|,)/";
$split_string = preg_split($regex, $string);
$split_wildcard = preg_split($regex, $wildcard);
foreach($split_wildcard as $key => $value) {
if(isset($split_string[$key]) && $split_string[$key] != $value) {
$wildcards[] = $split_string[$key];
}
}
return $wildcards;
}
用法示例:
$str1 = "I prefer Microsoft products to Apple but love Linux"; //original string
$str2 = "I prefer * products to * but love *"; //wildcard search
$value = wildcard_search($str1, $str2);
//$value should now be array([0] => "Microsoft", [1] => "Apple", [2] => "Linux");
shuffle($value);
vprintf('I prefer %s products to %s but love %s', $value);
// now we can get all kinds of outputs like:
// I prefer Microsoft products to Linux but love Apple
// I prefer Apple products to Microsoft but love Linux
// I prefer Linux products to Apple but love Microsoft
// etc..
我想在通配符之前实现对未知值的支持。
例:
$value = wildcard_search('Stackoverflow is an awesome site', 'Stack* is an awesome site');
// $value should now be array([0] => 'overflow');
// Because the wildcard (*) represents overflow in the second string
// (We already know some parts of the string but want to find the rest)
这可以在没有数百个循环等麻烦的情况下完成吗?
我将更改您的函数以使用preg_quote
并将转义的\\*
字符替换为(.*?)
:
function wildcard_search($string, $wildcard, $caseSensitive = false) {
$regex = '/^' . str_replace('\*', '(.*?)', preg_quote($wildcard)) . '$/' . (!$caseSensitive ? 'i' : '');
if (preg_match($regex, $string, $matches)) {
return array_slice($matches, 1); //Cut away the full string (position 0)
}
return false; //We didn't find anything
}
示例 :
<?php
$str1 = "I prefer Microsoft products to Apple but love Linux"; //original string
$str2 = "I prefer * products to * but love *"; //wildcard search
var_dump( wildcard_search($str1, $str2) );
$str1 = 'Stackoverflow is an awesome site';
$str2 = 'Stack* is an awesome site';
var_dump( wildcard_search($str1, $str2) );
$str1 = 'Foo';
$str2 = 'bar';
var_dump( wildcard_search($str1, $str2) );
?>
输出 :
array(3) {
[0]=>
string(9) "Microsoft"
[1]=>
string(5) "Apple"
[2]=>
string(5) "Linux"
}
array(1) {
[0]=>
string(8) "overflow"
}
bool(false)
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