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Php ldap compare () function

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(PHP 4 >= 4.0.2, PHP 5)

ldap_compare -- Compare value of attribute found in entry specified with DN

Syntax

bool ldap_compare ( resource link_identifier, string dn, string attribute, string value )

Returns TRUE if value matches otherwise returns FALSE. Returns -1 on error.

ldap_compare() is used to compare value of attribute to value of same attribute in LDAP directory entry specified with dn.

The following example demonstrates how to check whether or not given password matches the one defined in DN specified entry.

Example 1. Complete example of password check

<?php

$ds
=ldap_connect("localhost");  // assuming the LDAP server is on this host
      
if ($ds) {

    
// bind
    
if (ldap_bind($ds)) {

        
// prepare data
        
$dn = "cn=Matti Meikku, ou=My Unit, o=My Company, c=FI";
        
$value = "secretpassword";
        
$attr = "password";

        
// compare value
        
$r=ldap_compare($ds, $dn, $attr, $value);

        if (
$r === -1) {
            echo
"Error: " . ldap_error($ds);
        } elseif (
$r === true) {
            echo
"Password correct.";
        } elseif (
$r === false) {
            echo
"Wrong guess! Password incorrect.";
        }

    } else {
        echo
"Unable to bind to LDAP server.";
    }          

    
ldap_close($ds);

} else {
    echo
"Unable to connect to LDAP server.";
}
?>

Warning

ldap_compare() can NOT be used to compare BINARY values!

Note: This function was added in 4.0.2.

Php ldap compare Function syntax tag

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Php ldap compare syntax tutorial

php tutorial guide and code design are for easy learning and programming. The code practice section provided at the top is for practising of this syntax. Use the code section up to practice your php programming online. Learning php is very easy, all you need is to use the examples on this site and practice them to perfect your skills.


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