PHP : How to select specific parts of a string [duplicate] - php

Question

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Extract a substring between two characters in a string PHP
(11 answers)
Closed 10 months ago.
I was wondering... I have two strings :
"CN=CMPPDepartemental_Direction,OU=1 - Groupes de sécurité,OU=CMPP_Departementale,OU=Pole_Ambulatoire,OU=Utilisateurs_ADEI,DC=doadei,DC=wan",
"CN=CMPPDepartemental_Secretariat,OU=1 - Groupes de sécurité,OU=CMPP_Departementale,OU=Pole_Ambulatoire,OU=Utilisateurs_ADEI,DC=doadei,DC=wan"
Is there a way in php to select only the first part of these strings ? I would like to just select CMPPDepartemental_Direction and CMPPDepartemental_Secretariat.
I had thought of trying with substr() or trim() but without success.

Answer 1

You should use preg_match with regex CN=(\w+_\w+) to extract needed parts:
$strs = [
"CN=CMPPDepartemental_Direction,OU=1 - Groupes de sécurité,OU=CMPP_Departementale,OU=Pole_Ambulatoire,OU=Utilisateurs_ADEI,DC=doadei,DC=wan",
"CN=CMPPDepartemental_Secretariat,OU=1 - Groupes de sécurité,OU=CMPP_Departementale,OU=Pole_Ambulatoire,OU=Utilisateurs_ADEI,DC=doadei,DC=wan"
];
foreach ($strs as $str) {
$matches = null;
preg_match('/CN=(\w+_\w+)/', $str, $matches);
echo $matches[1];
}

Answer 2

If the strings always have the same structure, I recommend using a custom function find_by_keyword - so you can search for other keywords too.
function find_by_keyword( $string, $keyword ) {
$array = explode(",",$string);
$found = [];
// Loop through each item and check for a match.
foreach ( $array as $string ) {
// If found somewhere inside the string, add.
if ( strpos( $string, $keyword ) !== false ) {
$found[] = substr($string, strlen($keyword));
}
}
return $found;
}
var_dump(find_by_keyword($str2, "CN="));
// array(1) {
[0]=>
string(27) "CMPPDepartemental_Direction"
}
var_dump(find_by_keyword($str2, "OU="));
//array(4) {
[0]=>
string(25) "1 - Groupes de sécurité"
[1]=>
string(4) "CMPP"
[2]=>
string(4) "Pole"
[3]=>
string(12) "Utilisateurs"
}
Examle here.