正則表達式來刪除非鍵盤字符

Question

我試圖從用戶的輸入中刪除所有非鍵盤字符，我正在努力實現它。下面的正則表達式並沒有替代多個字符，只有一個...我試過在最後加上/ig而不是/i，但它作爲一個無法識別的標誌打破。我也嘗試使用*和各種其他組合，似乎無法弄清楚。

$data = preg_replace('/[^a-z0-9<>\s\!\@\#\$\%\^\&\*\(\)\_\+\-\=\{\}\[\]\|\\\:\;\"\'\?\/\>\.\<\,\®]/i', '', $data); 

測試反對這樣的文字：

Nutritional counseling <br /><br />Online Clinic Visits except as specifically covered in the Certificate or EOC. ÂÂ<br /><br />Health club memberships <br /><br />Any services to the extent you are entitled to receive Medicare benefits for those services without payment of additional premium for Medicare coverage <br /><br />Food or dietary supplements, except, as specifically stated in the certificate or EOC or as required by law <br /><br />Genetic testing for nonmedical reasons or when there is no medical indication or no family history of genetic abnormality <br /><br />Outdoor treatment programs <br /><br />Replacement of prosthetics and durable medical equipment when lost or stolen <br /><br />Any services or supplies provided to any person not covered under the Agreement in connection with a surrogate pregnancy <br /><br />Immunizations solely for travel outside the United States <br /><br />Services or supplies related to a pre-existing condition <br /><br />Educational services except as specifically provided or arranged by Anthem Blue Cross <br /><br />Infertility services (including sterilization reversal and costs associated with the storage of sperm, eggs, embryos and ovarian tissue) except as specifically stated in the certificate or EOC <br /><br />Care or treatment provided in a noncontracting hospital <br /><br />Private duty nursing except as specifically stated in the certificate or EOC <br /><br />Services primarily for weight reduction except medically necessary treatment of morbid obesity <br /><br />Outpatient drugs, medications or other substances dispensed or administered in any outpatient setting <br /><br />Contraceptive devices unless your physician determines that oral contraceptive drugs are not medically appropriate. <br /><br />Vein Treatment: Treatment of varicose veins or telangiectatic dermal veins (spider veins) by anyÂÂ method (including sclerotherapy or other surgeries) when services are rendered for cosmetic purposes. <br /><strong><br />Third Party Liability</strong> - Anthem Blue Cross is entitled to reimbursement of benefits paid if the member recovers damages from a legally liable third party. <br /><br /><strong>Coordination of Benefits</strong> - The benefits of this plan may be reduced if the member has any other group health, dental, prescription drug or vision coverage so that the services received from all group coverages do not exceed 100% of the covered expense.<br />

Answer 1

對不起，我在我的第一個答案混合的東西了。

PHP不知道g修飾符。如果您只想匹配它，請使用preg_match_all而不是preg_match，但preg_replace默認爲貪婪。

我試過writecodeonline.com

$data = "Nutritional counseling <br /><br />Online ÄÖÜ Clinic Visits except as specifically covered in the Certificate or EOC. ÂÂ<br /><br />"; 
$pattern = '/[^a-z0-9_<>\\s!@#$%^&*()+={}\\[\\]|\\/:;"\\'?.,®-]/i'; 

$data = preg_replace($pattern, '', $data); 
echo ($data); 

及其工作這段代碼。

出於某種原因，它需要雙倍轉義，如果你不需要它，只需刪除模式中的每一秒反斜槓。

我把你的角色班稍微清理一下。大多數角色在角色類中時不需要被轉義，只有那些在這樣的類中具有特殊含義的角色例如/當用作正則表達式分隔符時，'用作字符串分隔符時...

但最後甚至你的代碼在那裏工作，當我只是改變你的代碼來雙重轉義。