preg_match条件块何时执行？
preg_match 块何时执行的条件？
我有一个
$A = Array (
[0] => KSO/OCMT/GBP66401,/ 001 VTS EMIS 43628
[1] => KSO/OCMT/GBP1836,22/ ENCT LCR 090724
)
$test = 'KSO';
foreach($A as $temp_indice=>$temp)
{
if(preg_match("`(.*)".$test."(.*)`im", $temp,$matches))
{
//WHEN THIS BLOCK IS EXECUTE?
}
}
我已阅读 preg_match 没有从上面的代码就可以理解了。
这里有人能很好地理解 preg_match 解释一下吗？
preg_match condition when the block will execute?
I have an
$A = Array (
[0] => KSO/OCMT/GBP66401,/ 001 VTS EMIS 43628
[1] => KSO/OCMT/GBP1836,22/ ENCT LCR 090724
)
$test = 'KSO';
foreach($A as $temp_indice=>$temp)
{
if(preg_match("`(.*)".$test."(.*)`im", $temp,$matches))
{
//WHEN THIS BLOCK IS EXECUTE?
}
}
I have read preg_match not get the understand from the above code.
Could anybody here good understand about preg_match explain me?
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preg_match() 是关于正则表达式（又名正则表达式）的，它的目标是搜索字符串是否与特定模式匹配，例如检查它是否包含特定单词，是否是电子邮件，邮政编码，...
这里是您的正则表达式将匹配任何包含字符串“KSO”的字符串。正则表达式使用特定的语法，这可能就是您不理解它是如何工作的原因。您可以在这里找到更多详细信息：http://www.regular-expressions.info/
preg_match() is about regular expressions (aka regex), its goal is to search if a string matches a specific pattern, for example check if it contains a specific word, if it's an email, a zip code, ...
Here your regex will match any string containing the string 'KSO'. Regex uses a specific syntax, that's probably why you don't understand how it works. You will find more details here : http://www.regular-expressions.info/
如果未找到匹配项，则
preg_match返回0；如果存在匹配项，则返回1（并在此停止，使用preg_match_all更多）0也称为布尔值false和1代表true。这意味着，如果找到匹配项（每次在名为
$A的数组行中找到KSO时），它将执行该块preg_matchreturns0if no match is found and1if there's a match (and stop there, usepreg_match_allfor more)0is also known as the booleanfalseand1fortrue.That means, if a match is found (each time
KSOfound in a row of your array named$A) it'll execute the block