- var_dump: documentation ( source)
- print_r: documentation ( source)
- var_export: documentation ( source)
<?php
var_dump(array());
print("\n\n");
print_r(array());
print("\n\n");
print var_export(array(), 1);
print("\n\n");print("\n\n");
var_dump("");
print("\n\n");
print_r("");
print("\n\n");
print var_export("", 1);
print("\n\n");