What are the potential reasons for encountering a 500 error in PHP when retrieving LDAP attributes?

Encountering a 500 error in PHP when retrieving LDAP attributes could be due to incorrect LDAP query syntax, connection issues, or insufficient permissions to access the LDAP server. To solve this issue, double-check the LDAP query, ensure the connection to the LDAP server is successful, and verify that the user has the necessary permissions to retrieve the attributes. 

<?php

$ldapserver = 'ldap.example.com';
$ldapuser      = 'cn=admin,dc=example,dc=com';
$ldappass     = 'password';
$ldaptree    = "dc=example,dc=com";

$ldapconn = ldap_connect($ldapserver) or die("Could not connect to LDAP server.");

ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);

if ($ldapconn) {
    $ldapbind = ldap_bind($ldapconn, $ldapuser, $ldappass);

    if ($ldapbind) {
        $result = ldap_search($ldapconn, $ldaptree, "(objectclass=*)") or die ("Error in search query");
        $data = ldap_get_entries($ldapconn, $result);

        // Retrieve LDAP attributes here

        ldap_close($ldapconn);
    } else {
        echo "LDAP bind failed...";
    }
} else {
    echo "LDAP connection failed...";
}

?>

Keywords

PHP LDAP 500 error attributes retrieval

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