将php字符串中除英文字母、数字和键盘符号以外的所有项目替换为空

Question

我有一个php字符串，其中可能包含中文和其他不是utf8的符号。我需要删除所有这些，只需要维护英文字母，数字和常见的符号和空白。

我尝试过这样的正则表达式

    $text = preg_replace('/[^A-Za-z0-9\-]/', ' ', $words);

但是我没有得到想要的输出。我的字符串将如下所示：

l 2014 ;59:316 �猫聦聙 Efficacy and Safety of Terbinafine Hydrochloride 1% Cream vs. Sertaconazole Nitrate 2% Cream in Tinea Corporis and Tinea Cruris: A Comparative Therapeutic Trial .Indian Journal of Dermatology 2013 ;58(6):457 - 460 �猫聦聙 Congenital cutis laxa with rectal and uterovaginal prolapse. Indian J Dermatol Venereol Leprol 2011 ;77:321 - 4 �猫聦聙 Dermatitis neglecta. Indian J Dermatol Venereol Leprol 2011 ;77:62 - 3 �猫聦聙 Ichthyosis bullosa of Siemens sans history of blistering: an interesting case report Journal of Pakistan Association of Dermatologists 2009 ; 19: 171 - 174 Paper presentations �猫聦聙 Study of Autologous Serum Skin Test In Chronic Idiopathic Urtic aria at Cuticon conference , Dec 2010 �猫聦聙 Scenerio of Leprosy at Tertiary Care Level Centre In Rural Central India at Cuticon conference , Nov 2009 Poster presentations �猫聦聙 Extrav

我想移除�猫聦聙之类的东西。

Answer 1

看起来您只想保留可打印的ASCII字符，而想去掉其余的字符。

您可以使用此正则表达式，它将保留所有可打印的ascii字符，并删除其余字符。

[^ -~]+

这个正则表达式基本上使用从空格到最后一个ascii字符的范围字符集，即代字号。

如果这对你有效，请告诉我。如果你想进一步从ASCII列表中排除更多的字符，这很容易做到。告诉我就行了。

PHP代码演示

$words = "l 2014 ;59:316 �猫聦聙 Efficacy and Safety of Terbinafine Hydrochloride 1% Cream vs. Sertaconazole Nitrate 2% Cream in Tinea Corporis and Tinea Cruris: A Comparative Therapeutic Trial .Indian Journal of Dermatology 2013 ;58(6):457 - 460 �猫聦聙 Congenital cutis laxa with rectal and uterovaginal prolapse. Indian J Dermatol Venereol Leprol 2011 ;77:321 - 4 �猫聦聙 Dermatitis neglecta. Indian J Dermatol Venereol Leprol 2011 ;77:62 - 3 �猫聦聙 Ichthyosis bullosa of Siemens sans history of blistering: an interesting case report Journal of Pakistan Association of Dermatologists 2009 ; 19: 171 - 174 Paper presentations �猫聦聙 Study of Autologous Serum Skin Test In Chronic Idiopathic Urtic aria at Cuticon conference , Dec 2010 �猫聦聙 Scenerio of Leprosy at Tertiary Care Level Centre In Rural Central India at Cuticon conference , Nov 2009 Poster presentations �猫聦聙 Extrav";
echo preg_replace('/[^ -~]+/', '', $words);

仅打印您想要的字符。

l 2014 ;59:316  Efficacy and Safety of Terbinafine Hydrochloride 1% Cream vs. Sertaconazole Nitrate 2% Cream in Tinea Corporis and Tinea Cruris: A Comparative Therapeutic Trial .Indian Journal of Dermatology 2013 ;58(6):457 - 460  Congenital cutis laxa with rectal and uterovaginal prolapse. Indian J Dermatol Venereol Leprol 2011 ;77:321 - 4  Dermatitis neglecta. Indian J Dermatol Venereol Leprol 2011 ;77:62 - 3  Ichthyosis bullosa of Siemens sans history of blistering: an interesting case report Journal of Pakistan Association of Dermatologists 2009 ; 19: 171 - 174 Paper presentations  Study of Autologous Serum Skin Test In Chronic Idiopathic Urtic aria at Cuticon conference , Dec 2010  Scenerio of Leprosy at Tertiary Care Level Centre In Rural Central India at Cuticon conference , Nov 2009 Poster presentations  Extrav