Cita:
Iniciado por h2swider 
el php.ini a editar se encuentra en la carpeta apache/bin
max_execution_time = 1800 ;
max_input_time = 60 ;
memory_limit = 128M ;
Igualmente, seria una buena idea que ejecutes tu script por consola como te indicaron mas arriba.
Logré obtener un poco más de combinaciones cambiando max_execution_time = de 60 a 1800 pero pasa lo mismo se bloquea el navegador. Tengo
wamp server con Apache 2.2.17
Maximum execution time of each script, in seconds
;
http://php.net/max-execution-time
; Note: This directive is hardcoded to 0 for the CLI SAPI
max_execution_time = 1800
; Maximum amount of time each script may spend parsing request data. It's a good
; idea to limit this time on productions servers in order to eliminate unexpectedly
; long running scripts.
; Note: This directive is hardcoded to -1 for the CLI SAPI
; Default Value: -1 (Unlimited)
; Development Value: 60 (60 seconds)
; Production Value: 60 (60 seconds)
;
http://php.net/max-input-time
max_input_time = 60
; Maximum input variable nesting level
;
http://php.net/max-input-nesting-level
;max_input_nesting_level = 64
; Maximum amount of memory a script may consume (128MB)
;
http://php.net/memory-limit
memory_limit = 128M