The ldap_search() function lacks sizelimit and timelimit
options. There is a comment about adding timelimit..but
that has been there since PHP3.0.14 (at least).

I hope someone has time to dig into this..or can point
me in the right direction (to implement this myself). 

<--snip from ldap.h: -->

/*
 * structure representing an ldap connection
 */

typedef struct ldap {
        Sockbuf         ld_sb;          /* socket descriptor & buffer */
        char            *ld_host;
        int             ld_version;
        char            ld_lberoptions;
        int             ld_deref;
#define LDAP_DEREF_NEVER        0
#define LDAP_DEREF_SEARCHING    1
#define LDAP_DEREF_FINDING      2
#define LDAP_DEREF_ALWAYS       3

        int             ld_timelimit;
        int             ld_sizelimit;
#define LDAP_NO_LIMIT           0
<-- END snip -->