Question

我有成千上万的字符串，其中我只想选择那些没有任何特殊字符的字符串。特殊字符包括;:~?[]()+-_*^%$#@><{}\|/和数字0-9。所以基本上有效的句子是包含带逗号的字母或字母的句子。

最快的方法是什么，以便快速有效地完成任务。

示例：

1. She has the air of blank disdainful amusement a cat gets when toying with a mouse 
2. Origin Expand 1535-1545 1535-45; disdain + -ful Related forms Expand disdainfully, adverb disdainfulness, noun Synonyms Expand contemptuous, haughty, contumelious

3. British Dictionary definitions for disdainful Expand disdainful /dsdenfl/ adjective

4.An example of someone who is disdainful, is a person saying they dislike someone just because of their religion

应选择第1和第4句

所以我需要一些

的内容

if( $s does not have number an does not have special character)
{
//Save it
}

任何帮助将不胜感激艾哈迈尔

Answer 1

if (! preg_match('/[\'0-9^£$%&*()}{@#~?><>|=_+¬-]/', $string))
{
    // No special characters or numbers found in this string.
}

Answer 2

构建自己的正则表达式，只传递字母，空格，逗号。

^[a-zA-Z\s,]+$

OR

^[a-zA-Z\h,]+$

OR

^[\p{L}\h,]+$

DEMO

\h匹配水平空格。因此^[a-zA-Z\h,]+$匹配具有一个或多个空格或字母或逗号的行。 \p{L}会匹配任何语言的任何类型的信件。

if ( preg_match('~^[a-zA-Z\h,]+$~m', $string))
{
    // do here
}

Answer 3

^[^;:~?\[\]()+_*^%$#@><{}\|\/0-9-]+$

您也可以尝试这一点。参见演示。

http://regex101.com/r/oE6jJ1/32

$re = "/^[^;:~?\\[\\]()+_*^%$#@><{}\\|\\/0-9-]+$/im";
$str = "She has the air of blank disdainful amusement a cat gets when toying with a mouse \n\nOrigin Expand 1535-1545 1535-45; disdain + -ful Related forms Expand disdainfully, adverb disdainfulness, noun Synonyms Expand contemptuous, haughty, contumelious\n\nBritish Dictionary definitions for disdainful Expand disdainful /dsdenfl/ adjective\n\nAn example of someone who is disdainful, is a person saying they dislike someone just because of their religion";

preg_match_all($re, $str, $matches);

Answer 4

最有效的方法是检测字符串是否包含至少一个您不想要的字符：

使用范围：这假设您只处理ascii字符

if ( !preg_match('/[!-+--@[-`{-~]/', $str )) {
 // the string is allowed
}

或更广泛的用途：使用POSIX字符类

if ( !preg_match('/[^[:alpha:],[:space:]]/', $str )) {
 // the string is allowed
}

Answer 5

//your string variable:    

$string = "She has the air of blank disdainful amusement a cat gets when toying with a mouse 
Origin Expand 1535-1545 1535-45; disdain + -ful Related forms Expand disdainfully, adverb disdainfulness, noun Synonyms Expand contemptuous, haughty, contumelious

British Dictionary definitions for disdainful Expand disdainful /dsdenfl/ adjective

An example of someone who is disdainful, is a person saying they dislike someone just because of their religion";

//match function, and echo output    

preg_match_all('/^[a-z, ]+$/gmi', $string, $matches);

foreach($matches[0] as $found){
    echo $found . "\n"; //echoes sentences 1 and 4
}

如何选择不具有特殊字符或数字的字符串

5 个答案: