String manipulation with PROGMEM and strcat

Hello A string a stored in the non volatil memory using PROGMEM.

How can I recall it and use the value with strcat / strcopy functions?


const static char http_ [60] PROGMEM = "";


 strcpy (http_string, f(http_));// nop not working

You have strcpy_P() and strcat_P(). For more info: