The following code checks various scenarios in which inbuilt functions like intval, floatval, is_numeric, is_float and filter_var would result for several different types of values. Feel free to run in your local, leave comments if I can make the results more interesting with some more functions.
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| <?php | |
| // important to focus on the values with "e" scientific notation | |
| // interesting results for "0.1",-0, "1" and "042" | |
| $arr = ["true", true, false, "false", | |
| 0, -0.0, 00, "-0", "+0", "-0.0", "+0.0", "0", "0w", "0.0t", | |
| "0.1", 0.1, 1, "1", | |
| 1e4, "2e", 2e4, "2e4", | |
| 1337e0, "1e3", 1e1, | |
| 1.3, "1.4", "1t", "1.5n", | |
| 0x1A, '0x539', | |
| 042, "042", +42, -42, "+42", "-42"]; | |
| $ent = "&#"; | |
| $valid = $ent . "9989"; | |
| $invalid = $ent . "10060"; | |
| foreach ($arr as $k => $i) { | |
| echo "Test Value " . ($k + 1) . ": (" . gettype($i) . ")" . $i . "<br>"; | |
| echo "Integer <b>converted</b> Value: " . (int)$i . "<br>"; // can use intval also | |
| echo "Float <b>converted</b> Value: " . (float)$i . "<br>"; // can use floatval also | |
| if (is_numeric($i) !== false) | |
| echo "$valid Valid Integer as per <i>is_numeric</i><br>"; | |
| else | |
| echo "$invalid Invalid Integer as per <i>is_numeric</i><br>"; | |
| if (is_float($i) !== false) | |
| echo "$valid Valid Float as per <i>is_float</i><br>"; | |
| else echo "$invalid Invalid Float as per <i>is_float</i><br>"; | |
| if (filter_var($i, FILTER_VALIDATE_INT) === 0 || !filter_var($i, FILTER_VALIDATE_INT) === false) { | |
| $yourInteger = intval($i); | |
| echo "$valid Valid Integer as per filter validate<br>"; | |
| } else { | |
| $yourInteger = false; | |
| echo "$invalid Invalid Integer as per filter validate<br>"; | |
| } | |
| if (filter_var($i, FILTER_VALIDATE_FLOAT) === 0 || !filter_var($i, FILTER_VALIDATE_FLOAT) === false) { | |
| $yourFloat = floatval($i); | |
| echo "$valid Valid Float as per filter validate<br>"; | |
| } else { | |
| $yourFloat = false; | |
| echo "$invalid Invalid Float as per filter validate<br>"; | |
| } | |
| echo "----<br>"; | |
| } |
https://gist.github.com/harshvardhanmalpani/8dd0222e4821d0e495532abe9007fef1
Output / Results
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 | Test Value 1: (string)trueInteger converted Value: 0Float converted Value: 0❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 2: (boolean)1Integer converted Value: 1Float converted Value: 1❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 3: (boolean)Integer converted Value: 0Float converted Value: 0❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 4: (string)falseInteger converted Value: 0Float converted Value: 0❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 5: (integer)0Integer converted Value: 0Float converted Value: 0✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 6: (double)-0Integer converted Value: 0Float converted Value: -0✅ Valid Integer as per is_numeric✅ Valid Float as per is_float✅ Valid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 7: (integer)0Integer converted Value: 0Float converted Value: 0✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 8: (string)-0Integer converted Value: 0Float converted Value: -0✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 9: (string)+0Integer converted Value: 0Float converted Value: 0✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 10: (string)-0.0Integer converted Value: 0Float converted Value: -0✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 11: (string)+0.0Integer converted Value: 0Float converted Value: 0✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 12: (string)0Integer converted Value: 0Float converted Value: 0✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 13: (string)0wInteger converted Value: 0Float converted Value: 0❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 14: (string)0.0tInteger converted Value: 0Float converted Value: 0❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 15: (string)0.1Integer converted Value: 0Float converted Value: 0.1✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 16: (double)0.1Integer converted Value: 0Float converted Value: 0.1✅ Valid Integer as per is_numeric✅ Valid Float as per is_float❌ Invalid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 17: (integer)1Integer converted Value: 1Float converted Value: 1✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 18: (string)1Integer converted Value: 1Float converted Value: 1✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 19: (double)10000Integer converted Value: 10000Float converted Value: 10000✅ Valid Integer as per is_numeric✅ Valid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 20: (string)2eInteger converted Value: 2Float converted Value: 2❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 21: (double)20000Integer converted Value: 20000Float converted Value: 20000✅ Valid Integer as per is_numeric✅ Valid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 22: (string)2e4Integer converted Value: 20000Float converted Value: 20000✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 23: (double)1337Integer converted Value: 1337Float converted Value: 1337✅ Valid Integer as per is_numeric✅ Valid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 24: (string)1e3Integer converted Value: 1000Float converted Value: 1000✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 25: (double)10Integer converted Value: 10Float converted Value: 10✅ Valid Integer as per is_numeric✅ Valid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 26: (double)1.3Integer converted Value: 1Float converted Value: 1.3✅ Valid Integer as per is_numeric✅ Valid Float as per is_float❌ Invalid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 27: (string)1.4Integer converted Value: 1Float converted Value: 1.4✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 28: (string)1tInteger converted Value: 1Float converted Value: 1❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 29: (string)1.5nInteger converted Value: 1Float converted Value: 1.5❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 30: (integer)26Integer converted Value: 26Float converted Value: 26✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 31: (string)0x539Integer converted Value: 0Float converted Value: 0❌ Invalid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate❌ Invalid Float as per filter validate----Test Value 32: (integer)34Integer converted Value: 34Float converted Value: 34✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 33: (string)042Integer converted Value: 42Float converted Value: 42✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float❌ Invalid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 34: (integer)42Integer converted Value: 42Float converted Value: 42✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 35: (integer)-42Integer converted Value: -42Float converted Value: -42✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 36: (string)+42Integer converted Value: 42Float converted Value: 42✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate----Test Value 37: (string)-42Integer converted Value: -42Float converted Value: -42✅ Valid Integer as per is_numeric❌ Invalid Float as per is_float✅ Valid Integer as per filter validate✅ Valid Float as per filter validate---- |
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