int extract(LVariableTable *variables, CArrRef var_array,
int extract_type /* = EXTR_OVERWRITE */,
String prefix /* = "" */) {
FUNCTION_INJECTION_BUILTIN(extract);
bool reference = extract_type & EXTR_REFS;
extract_type &= ~EXTR_REFS;
int count = 0;
for (ArrayIter iter(var_array); iter; ++iter) {
String name = iter.first();
switch (extract_type) {
case EXTR_SKIP:
if (variables->exists(name)) continue;
break;
case EXTR_IF_EXISTS:
if (!variables->exists(name)) continue;
break;
case EXTR_PREFIX_SAME:
if (variables->exists(name)) name = prefix + "_" + name;
break;
case EXTR_PREFIX_ALL:
name = prefix + "_" + name;
break;
case EXTR_PREFIX_INVALID:
if (!name.isValidVariableName()) name = prefix + "_" + name;
break;
case EXTR_PREFIX_IF_EXISTS:
if (!variables->exists(name)) continue;
name = prefix + "_" + name;
break;
default:
break;
}
// skip invalid variable names, as in PHP
if (!name.isValidVariableName()) continue;
if (reference) {
variables->get(name).assignRef(iter.secondRef());
} else {
variables->get(name).assignVal(iter.second());
}
count++;
}
return count;
}
Variant func_get_arg(int num_args, CArrRef params, CArrRef args, int pos) {
FUNCTION_INJECTION_BUILTIN(func_get_arg);
if (num_args <= params.size()) {
if (pos >= 0 && pos < num_args) {
return params.rvalAt(pos);
}
} else {
if (pos >= 0) {
int index = pos - params.size();
if (index < 0) {
return params.rvalAt(pos);
}
if (index < args.size()) {
return args.rvalAt(index);
}
}
}
return false;
}
Array func_get_args(int num_args, CArrRef params, CArrRef args) {
FUNCTION_INJECTION_BUILTIN(func_get_args);
if (params.empty() && args.empty()) return Array::Create();
if (args.empty()) {
if (num_args < params.size()) {
return params.slice(0, num_args, false);
}
return params;
}
Array derefArgs;
for (ArrayIter iter(args); iter; ++iter) {
derefArgs.append(iter.second());
}
if (params.empty()) return derefArgs;
ASSERT(num_args > params.size());
Array ret = Array(params).merge(derefArgs);
return ret;
}
