Question

我使用strcasecmp()来比较两个字符串，如果字符串中有不同的字符串，我该如何打印出来。

例如：

$string1 = "Hello World;";
$string2 = "Hellow World";

if(strcasecmp($string1, $string2) ==0){
     echo $string1;
     echo $string2;
}else{
     echo #the difference;
}

应打印出来：

";" "Hellow"

Answer 1

您可以尝试这样的事情：

<?php
$string1 = "Hello World;";
$string2 = "Hellow World";

/* Transform each string into character array */
$s1 = str_split($string1);
$s2 = str_split($string2);

/* Let's print them just so you can see */
print_r($s1);
print_r($s2);


/* Check if the character from first string, exists in string 2 */
foreach ($s1 as $key1 => $value1) {
  if (($key2 = array_search($value1, $s2)) ) { //If the character from the first string, is found in the second string...
   if (strcasecmp($value1, $s2[$key2]) == 0) {  //Make sure the case matches
      unset($s1[$key1]);        //Remove the matched character from the first string.
      unset($s2[$key2]); //Remove the matched character from the second string.
    }
  }
}

/* Note that because 0 also means false, we need to check
 * if the characters at index 0 match or not */
if (strcasecmp($s1[0], $s2[0]) == 0) {
  unset($s1[0]);
  unset($s2[0]);
}

$differences = array_merge($s1, $s2);
if ($num_differences = sizeOf($differences)) {
        echo "Found $num_differences differences in the two strings. They are: \n";
        print_r($differences);
}

上面的代码检查字符串1中的每个字符是否都存在于字符串2中。如果字符确实存在，我们将它从两个数组中删除，以便在每个数组中找不到任何未找到的字符。

PHP-打印两个字符串的差异

1 个答案: