[Misiur]

Better worry about your code indentation.

pawn Код:

//Change
new GrafText[MAX_PLAYERS];
//to
#define MAX_GRAFTEXT (64)
new GrafText[MAX_PLAYERS][MAX_GRAFTEXT];

//Change
GrafText[playerid] = strval(inputtext);
//to
strcat(GrafText[playerid], inputtext, MAX_GRAFTEXT);

//Change each
SetObjectMaterialText(graffity, GrafText,0,OBJECT_MATERIAL_SIZE_256x256,"Arial",24,1,0xXXXXXXXX,0,OBJECT_MATERIAL_TEXT_ALIGN_CENTER);
//to
SetObjectMaterialText(graffity, GrafText[playerid],0,OBJECT_MATERIAL_SIZE_256x256,"Arial",24,1,0xXXXXXXXX,0,OBJECT_MATERIAL_TEXT_ALIGN_CENTER);