1--TEST-- 2Testing empty() with string offsets 3--FILE-- 4<?php 5 6print "- empty ---\n"; 7 8$str = "test0123"; 9 10var_dump(empty($str[-1])); 11var_dump(empty($str[-10])); 12var_dump(empty($str[-4])); // 0 13var_dump(empty($str[0])); 14var_dump(empty($str[1])); 15var_dump(empty($str[4])); // 0 16var_dump(empty($str[5])); // 1 17var_dump(empty($str[8])); 18var_dump(empty($str[10000])); 19// non-numeric offsets 20print "- string literal ---\n"; 21var_dump(empty($str['-1'])); // 3 22var_dump(empty($str['-10'])); 23var_dump(empty($str['0'])); 24var_dump(empty($str['1'])); 25var_dump(empty($str['4'])); // 0 26var_dump(empty($str['1.5'])); 27var_dump(empty($str['good'])); 28var_dump(empty($str['3 and a half'])); 29print "- string variable ---\n"; 30var_dump(empty($str[$key = '-1'])); // 3 31var_dump(empty($str[$key = '-10'])); 32var_dump(empty($str[$key = '0'])); 33var_dump(empty($str[$key = '1'])); 34var_dump(empty($str[$key = '4'])); // 0 35var_dump(empty($str[$key = '1.5'])); 36var_dump(empty($str[$key = 'good'])); 37var_dump(empty($str[$key = '3 and a half'])); 38print "- bool ---\n"; 39var_dump(empty($str[true])); 40var_dump(empty($str[false])); 41var_dump(empty($str[false][true])); 42print "- null ---\n"; 43var_dump(empty($str[null])); 44print "- double ---\n"; 45var_dump(empty($str[-1.1])); 46var_dump(empty($str[-10.5])); 47var_dump(empty($str[-4.1])); 48var_dump(empty($str[-0.8])); 49var_dump(empty($str[-0.1])); 50var_dump(empty($str[0.2])); 51var_dump(empty($str[0.9])); 52var_dump(empty($str[M_PI])); 53var_dump(empty($str[100.5001])); 54print "- array ---\n"; 55var_dump(empty($str[array()])); 56var_dump(empty($str[array(1,2,3)])); 57print "- object ---\n"; 58var_dump(empty($str[new stdClass()])); 59print "- resource ---\n"; 60$f = fopen(__FILE__, 'r'); 61var_dump(empty($str[$f])); 62print "done\n"; 63 64?> 65--EXPECTF-- 66- empty --- 67bool(false) 68bool(true) 69bool(true) 70bool(false) 71bool(false) 72bool(true) 73bool(false) 74bool(true) 75bool(true) 76- string literal --- 77bool(false) 78bool(true) 79bool(false) 80bool(false) 81bool(true) 82bool(true) 83bool(true) 84bool(true) 85- string variable --- 86bool(false) 87bool(true) 88bool(false) 89bool(false) 90bool(true) 91bool(true) 92bool(true) 93bool(true) 94- bool --- 95bool(false) 96bool(false) 97bool(true) 98- null --- 99bool(false) 100- double --- 101bool(false) 102bool(true) 103bool(true) 104bool(false) 105bool(false) 106bool(false) 107bool(false) 108bool(false) 109bool(true) 110- array --- 111bool(true) 112bool(true) 113- object --- 114bool(true) 115- resource --- 116bool(true) 117done 118