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一个用户在我的网站上发布了一些奇怪的字符,我想阻止他们这样做,但不阻止外语中使用的字符......因此,使用正则表达式,例如 [a-z0-9!@#$%^&*()...]
不是一个选项。
有人可以向我解释这里发生了什么,分解为什么它显示它的方式。角色是如何创建的,我该如何防止他们这样做?
♥̧̧̧̛̣̘̟̘̥͓̫̪̹̪̪̮̯̞̘̙̦̝̭̭͕̜̰̩̗̟̹͔̜̥̟̗̗̥̦̠̖̫͕̺̻̞̥̹͇̱̥̥̻͇̦̙̣͊͗̉̽̈́̉͑̀́̃͒̏͋̃̅̇̊̏̎̈́͊͐̉͑̄̌̉́̈́́́̅̇͌̽̽͗́̄̾̓̈́̇̅͛́̈́͐̽̔̌̋̌̾́̿͌̔͊͆̈́̉́̎̔̊͗̊̂̎̍̏̈̀̏͋͌̋̽̄̐̽͐̀͘̕̕͘̕̚̚̚͘͜͜͜͠͝͠͝͠͝
最佳答案
这些是 combining diacritical marks .对于字符 é e-acute,您可以使用代码点 U+00E9 (LATIN_SMALL_LETTER_E_WITH_ACUTE) 或序列 U+0065 U+0301 (LATIN_SMALL_LETTER_E COMBINING_ACUTE_ACENT) 来表示它,其中文本渲染器将重音放在前面的代码点之上。
用户正在使用一系列组合标记来利用它:
codepoint glyph escaped UTF-8 info
=======================================================================
U+2665 ♥ \u2665 e2,99,a5, MISCELLANEOUS_SYMBOLS, OTHER_SYMBOL
U+034a ͊ \u034a cd,8a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0360 ͠ \u0360 cd,a0, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0357 ͗ \u0357 cd,97, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309 ̉ \u0309 cc,89, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d ̽ \u033d cc,bd, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344 ̈́ \u0344 cd,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309 ̉ \u0309 cc,89, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0351 ͑ \u0351 cd,91, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0340 ̀ \u0340 cd,80, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035d ͝ \u035d cd,9d, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301 ́ \u0301 cc,81, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0303 ̃ \u0303 cc,83, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0352 ͒ \u0352 cd,92, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030f ̏ \u030f cc,8f, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034b ͋ \u034b cd,8b, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0303 ̃ \u0303 cc,83, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0305 ̅ \u0305 cc,85, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0307 ̇ \u0307 cc,87, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030a ̊ \u030a cc,8a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030f ̏ \u030f cc,8f, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030e ̎ \u030e cc,8e, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344 ̈́ \u0344 cd,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034a ͊ \u034a cd,8a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0350 ͐ \u0350 cd,90, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309 ̉ \u0309 cc,89, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0351 ͑ \u0351 cd,91, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0304 ̄ \u0304 cc,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030c ̌ \u030c cc,8c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309 ̉ \u0309 cc,89, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301 ́ \u0301 cc,81, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344 ̈́ \u0344 cd,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0341 ́ \u0341 cd,81, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301 ́ \u0301 cc,81, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0305 ̅ \u0305 cc,85, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0307 ̇ \u0307 cc,87, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034c ͌ \u034c cd,8c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d ̽ \u033d cc,bd, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d ̽ \u033d cc,bd, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0357 ͗ \u0357 cd,97, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301 ́ \u0301 cc,81, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0360 ͠ \u0360 cd,a0, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0304 ̄ \u0304 cc,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033e ̾ \u033e cc,be, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0343 ̓ \u0343 cd,83, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344 ̈́ \u0344 cd,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0307 ̇ \u0307 cc,87, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0358 ͘ \u0358 cd,98, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0305 ̅ \u0305 cc,85, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035d ͝ \u035d cd,9d, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035b ͛ \u035b cd,9b, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301 ́ \u0301 cc,81, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344 ̈́ \u0344 cd,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0350 ͐ \u0350 cd,90, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d ̽ \u033d cc,bd, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0314 ̔ \u0314 cc,94, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030c ̌ \u030c cc,8c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030b ̋ \u030b cc,8b, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030c ̌ \u030c cc,8c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033e ̾ \u033e cc,be, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0360 ͠ \u0360 cd,a0, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301 ́ \u0301 cc,81, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033f ̿ \u033f cc,bf, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034c ͌ \u034c cd,8c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0314 ̔ \u0314 cc,94, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0315 ̕ \u0315 cc,95, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034a ͊ \u034a cd,8a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0346 ͆ \u0346 cd,86, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344 ̈́ \u0344 cd,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309 ̉ \u0309 cc,89, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035d ͝ \u035d cd,9d, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0341 ́ \u0341 cd,81, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0315 ̕ \u0315 cc,95, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030e ̎ \u030e cc,8e, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0314 ̔ \u0314 cc,94, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030a ̊ \u030a cc,8a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0357 ͗ \u0357 cd,97, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0358 ͘ \u0358 cd,98, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030a ̊ \u030a cc,8a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0315 ̕ \u0315 cc,95, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0302 ̂ \u0302 cc,82, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030e ̎ \u030e cc,8e, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030d ̍ \u030d cc,8d, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030f ̏ \u030f cc,8f, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0308 ̈ \u0308 cc,88, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0340 ̀ \u0340 cd,80, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030f ̏ \u030f cc,8f, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031a ̚ \u031a cc,9a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034b ͋ \u034b cd,8b, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031a ̚ \u031a cc,9a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031a ̚ \u031a cc,9a, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034c ͌ \u034c cd,8c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030b ̋ \u030b cc,8b, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d ̽ \u033d cc,bd, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0304 ̄ \u0304 cc,84, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0310 ̐ \u0310 cc,90, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d ̽ \u033d cc,bd, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0350 ͐ \u0350 cd,90, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031b ̛ \u031b cc,9b, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0358 ͘ \u0358 cd,98, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0300 ̀ \u0300 cc,80, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0323 ̣ \u0323 cc,a3, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0318 ̘ \u0318 cc,98, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031f ̟ \u031f cc,9f, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035c ͜ \u035c cd,9c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0318 ̘ \u0318 cc,98, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035c ͜ \u035c cd,9c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325 ̥ \u0325 cc,a5, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0353 ͓ \u0353 cd,93, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032b ̫ \u032b cc,ab, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032a ̪ \u032a cc,aa, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0339 ̹ \u0339 cc,b9, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032a ̪ \u032a cc,aa, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032a ̪ \u032a cc,aa, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035c ͜ \u035c cd,9c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032e ̮ \u032e cc,ae, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032f ̯ \u032f cc,af, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0327 ̧ \u0327 cc,a7, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031e ̞ \u031e cc,9e, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0318 ̘ \u0318 cc,98, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0319 ̙ \u0319 cc,99, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0326 ̦ \u0326 cc,a6, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031d ̝ \u031d cc,9d, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032d ̭ \u032d cc,ad, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032d ̭ \u032d cc,ad, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0355 ͕ \u0355 cd,95, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031c ̜ \u031c cc,9c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0330 ̰ \u0330 cc,b0, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0329 ̩ \u0329 cc,a9, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0317 ̗ \u0317 cc,97, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031f ̟ \u031f cc,9f, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0339 ̹ \u0339 cc,b9, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0354 ͔ \u0354 cd,94, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031c ̜ \u031c cc,9c, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325 ̥ \u0325 cc,a5, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031f ̟ \u031f cc,9f, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0317 ̗ \u0317 cc,97, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0317 ̗ \u0317 cc,97, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325 ̥ \u0325 cc,a5, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0326 ̦ \u0326 cc,a6, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0320 ̠ \u0320 cc,a0, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0316 ̖ \u0316 cc,96, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032b ̫ \u032b cc,ab, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0355 ͕ \u0355 cd,95, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033a ̺ \u033a cc,ba, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0327 ̧ \u0327 cc,a7, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033b ̻ \u033b cc,bb, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031e ̞ \u031e cc,9e, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325 ̥ \u0325 cc,a5, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0327 ̧ \u0327 cc,a7, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0339 ̹ \u0339 cc,b9, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0347 ͇ \u0347 cd,87, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0331 ̱ \u0331 cc,b1, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325 ̥ \u0325 cc,a5, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325 ̥ \u0325 cc,a5, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033b ̻ \u033b cc,bb, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0347 ͇ \u0347 cd,87, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0326 ̦ \u0326 cc,a6, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0319 ̙ \u0319 cc,99, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0323 ̣ \u0323 cc,a3, COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
"\u2665\u034a\u0360\u0357"
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