Php 如何获取JSON字符串差异百分比

是否有任何逻辑/算法来比较两个JSON字符串的差异百分比。我试图用它来验证作为JSON字符串存储的签名

字符串1：

[
  {"lx":5,"ly":34,"mx":5,"my":33},
  {"lx":5,"ly":34,"mx":5,"my":34},
  {"lx":6,"ly":32,"mx":5,"my":34},
  {"lx":7,"ly":31,"mx":6,"my":32},
  {"lx":8,"ly":31,"mx":7,"my":31},
  {"lx":9,"ly":30,"mx":8,"my":31},
  {"lx":10,"ly":29,"mx":9,"my":30},
  {"lx":11,"ly":29,"mx":10,"my":29},
  {"lx":11,"ly":28,"mx":11,"my":29}
]

字符串2：

[
  {"lx":5,"ly":33,"mx":5,"my":32},
  {"lx":5,"ly":33,"mx":5,"my":33},
  {"lx":6,"ly":32,"mx":5,"my":33},
  {"lx":7,"ly":32,"mx":6,"my":32},
  {"lx":8,"ly":32,"mx":7,"my":32},
  {"lx":9,"ly":32,"mx":8,"my":32},
  {"lx":10,"ly":31,"mx":9,"my":32},
  {"lx":11,"ly":30,"mx":10,"my":31},
  {"lx":12,"ly":30,"mx":11,"my":30},
  {"lx":13,"ly":29,"mx":12,"my":30}
]

---

如有任何建议，将不胜感激

我并没有完全了解您想要做什么，但如果您只是想检查字符串的相似性，可以使用php命令

样本：

$str1 = '{"lx":5,"ly":34,"mx":5,"my":33},
  {"lx":5,"ly":34,"mx":5,"my":34},
  {"lx":6,"ly":32,"mx":5,"my":34},
  {"lx":7,"ly":31,"mx":6,"my":32},
  {"lx":8,"ly":31,"mx":7,"my":31},
  {"lx":9,"ly":30,"mx":8,"my":31},
  {"lx":10,"ly":29,"mx":9,"my":30},
  {"lx":11,"ly":29,"mx":10,"my":29},
  {"lx":11,"ly":28,"mx":11,"my":29}';

  $str2 = '{"lx":5,"ly":33,"mx":5,"my":32},
  {"lx":5,"ly":33,"mx":5,"my":33},
  {"lx":6,"ly":32,"mx":5,"my":33},
  {"lx":7,"ly":32,"mx":6,"my":32},
  {"lx":8,"ly":32,"mx":7,"my":32},
  {"lx":9,"ly":32,"mx":8,"my":32},
  {"lx":10,"ly":31,"mx":9,"my":32},
  {"lx":11,"ly":30,"mx":10,"my":31},
  {"lx":12,"ly":30,"mx":11,"my":30},
  {"lx":13,"ly":29,"mx":12,"my":30}';

  $percent = 0;

  echo similar_text($str1,$str2,$percent).' equal chars'.PHP_EOL;
  echo $percent.'% similarity';

给你：

269 equal chars
78.425655976676% similarity

---

可以使用该函数计算字符串距离

---

很遗憾，它被限制为长度不超过255个字符的字符串。

您能澄清一下您的问题吗？您的示例的预期结果是什么？实际上字符串1是我保存在数据库中的某些行（表示签名）的json表示形式。现在字符串2再次是类似的签名，可能会有一些小的变化，所以我只想比较字符串，这样系统就可以判断它是匹配的签名。这与我要查找的非常接近。谢谢你的建议。