Conditions | 7 |
Paths | 6 |
Total Lines | 20 |
Code Lines | 11 |
Lines | 0 |
Ratio | 0 % |
Changes | 0 |
1 | <?php |
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47 | public function firstDifference($old, $new) |
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48 | { |
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49 | // loop through old and new character by character and compare |
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50 | $oldLen = mb_strlen($old); |
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51 | $newLen = mb_strlen($new); |
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52 | |||
53 | if ($oldLen === 0) { |
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54 | return 0; |
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55 | } |
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56 | |||
57 | for ($i = 0; $i < $oldLen && $i < $newLen; $i++) { |
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58 | if (mb_substr($old, $i, 1) !== mb_substr($new, $i, 1)) { |
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59 | return $i; |
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60 | } |
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61 | } |
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62 | if ($i < $oldLen || $i < $newLen) { |
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63 | return $i; |
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64 | } |
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65 | return -1; |
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66 | } |
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67 | } |
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68 |