I have difficulties with regex. I just need to split a string of entries.
Input: "arg1 arg2 arg3 arg4"; Output: [arg1, arg2, arg3, arg4]
Input: "arg1 'arg 2' arg3 arg4"; Output: [arg1, arg 2, arg3, arg4]
My problem is in the second example. For when the argument is in quotation marks, I must keep it intact. And as I'm using PHP's explode function, I end up having two arguments ( [arg, 2] );
Assuming the default is arg being fixed:
$str = "arg1 'arg 2' arg3 arg4";
preg_match_all("~arg\d|'arg[^']+'~", $str, $matchs);
print_r($matchs[0]);
If you do not want to include ' use: arg\d|(?<=')arg[^']+(?=')
As commented arg are actually arguments of any kind:
So the regex had to be changed:
Input: seed.php app:init "app" "/seed/" "Lucas Mahle"
Regex: ['"].*?['"]|[^ ]+
I do not know about PHP, but I created an example in javascript that might help you understand the regular expression (follow the comments in the code):
function splitArguments(arguments) {
return arguments.replace(
/* procura tudo que está entre ' nos argumentos */
/\'([^']+)\'/g, function(replacement) {
/* procura espaço no que está entre ' e substitui por '__' */
return replacement.replace(/ /g, '__');
})
// troca os espaços em branco dos separadores por ||
.replace(/ /g, '||')
// retorna o __ para espaço em branco dentro do argumento
.replace(/__/g, ' ')
// aplica split pelo novo separador de argumentos ||
.split(/\|\|/g);
}
console.log(splitArguments("arg1 arg2 arg3 arg4"));
console.log(splitArguments("arg1 'arg 2' arg3 arg4"));
console.log(splitArguments("arg1 'arg 2' arg3 'arg 4'"));I think this update solved the flaws, if you notice any flaws in any test cases, please comment.