1--TEST-- 2casting different variables to double 3--INI-- 4precision=14 5--FILE-- 6<?php 7 8$r = fopen(__FILE__, "r"); 9 10class test { 11 function __toString() { 12 return "10"; 13 } 14} 15 16$o = new test; 17 18$vars = array( 19 "string", 20 "8754456", 21 "", 22 "\0", 23 9876545, 24 0.10, 25 array(), 26 array(1,2,3), 27 false, 28 true, 29 NULL, 30 $r, 31 $o 32); 33 34foreach ($vars as $var) { 35 $tmp = (double)$var; 36 var_dump($tmp); 37} 38 39echo "Done\n"; 40?> 41--EXPECTF-- 42float(0) 43float(8754456) 44float(0) 45float(0) 46float(9876545) 47float(0.1) 48float(0) 49float(1) 50float(0) 51float(1) 52float(0) 53float(%f) 54 55Warning: Object of class test could not be converted to float in %s on line %d 56float(1) 57Done 58