PHP / Regex: 从字符串中删除字符串

preg_match/'/myCountry\:\s*/[^\;]+//', $mainString, $out/;

$myRegion = $out[1];

;

myCountry: region1, region2, region3

;

otherCountry: region1

$string = 'otherCountry: region1; myCountry: region1; otherCountry: region2, region3';

$definitions = explode /';', $string/;

array/3/ {

 [0]=>

 string/21/ "otherCountry: region1"

 [1]=>

 string/19/ " myCountry: region1"

 [2]=>

 string/31/ " otherCountry: region2, region3"

}

:

,

$result = array//;

foreach /$definitions as $countryDefinition/ {

 $parts = explode /':', $countryDefinition/; // parting at the :

 $country = trim/$parts[0]/; // look up trim to understand this

 $regions = explode/',', $parts[1]/; // exploding by the , to get the regions array

 if/!array_key_exists/$country, $result// { // check if the country is already defined in $result

 $result[$country] = array//;

 }

 $result[$country] = array_merge/$result[$country], $regions/;

}