Question

我有以下字符串：

Over/Under 1.5
Over/Under 2.5
Over/Under 3.5
Over/Under 4.5
This is not Over/Under 1.5
Other text

对我来说，有效的文本如下

Over/Under 1.5
Over/Under 2.5
Over/Under 3.5
Over/Under 4.5
Over/Under X.X

X.X是一个数字。

如何判断天气是否为有效字符串？

Answer 1

if(preg_match('/Over\/Under \d\.\d/', $str)) {

}

Answer 2

检查它是否与正则表达式匹配

Over/Under [0-9]*.[0-9]*

（如果是Over或Under，请选择(Over|Under)

Answer 3

This es not Over/Under 1.5是否匹配？如果是这样的话：

$words = array('Over/Under 1.5',
'Over/Under 2.5',
'Over/Under 3.5',
'Over/Under 4.5',
'This es not Over/Under 1.5',
'Other text');

foreach ($words as $word) {
  if (preg_match('#.*Over/Under \d\.\d.*#', $word)) {
    echo "Match $word\n";
  }
}

如果没有，请将preg_match更改为

preg_match('#^Over/Under \d\.\d$#', $word);

像@Tokk写道，如果字符串匹配Over OR Under，那么你需要改为OR - |

preg_match('#^(Over|Under) \d\.\d$#', $word);

Answer 4

使用正则表达式。我自己并不擅长，但这对我有用：

$吨

mp  = array
(
    "Over/Under 1.5",
    "Over/Under 2.5",
    "Over/Under 3.5",
    "Over/Under 4.5",
    "Over/Under 5.5",
    "fdgdfgdf",
    "Other"
);

$tmp2 = array_filter($tmp, function($element) { return preg_match('(Over\/Under [0-9]\.[0-9])', $element); });
print_r($tmp2);

http://php.net/manual/en/function.preg-match.php了解更多信息

从单词列表中获取有用的单词

4 个答案: