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<?php function tryGetPhoneNumber($input) { if (preg_match('/(?<phoneNumber>\d{3}-\d{3}-\d{4})/', $input, $match)) { return $match['phoneNumber']; } return false; } $value = tryGetPhoneNumber("I'm going to call 555-123-4567 tomorrow.", $phoneNumber); if (is_string($value)) { var_dump($value); } else { echo 'No phone number.'; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $phoneNumber in /in/QC3HP on line 9 string(12) "555-123-4567"
Output for 5.2.2 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: phoneNumber in /in/QC3HP on line 9 string(12) "555-123-4567"
Output for 7.3.32 - 7.3.33
string(12) "555-123-4567"
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.1
Notice: Undefined variable: phoneNumber in /in/QC3HP on line 9 Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 3 in /in/QC3HP on line 4 No phone number.
Output for 4.3.11, 4.4.0 - 4.4.5, 5.0.0 - 5.0.3
Notice: Undefined variable: phoneNumber in /in/QC3HP on line 9 Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 3 in /in/QC3HP on line 4 No phone number.
Output for 4.4.6 - 4.4.9
Notice: Undefined variable: phoneNumber in /in/QC3HP on line 9 string(12) "555-123-4567"
Output for 4.3.0 - 4.3.10
Notice: Undefined variable: phoneNumber in /in/QC3HP on line 9 Warning: Compilation failed: unrecognized character after (?< at offset 3 in /in/QC3HP on line 4 No phone number.
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313.65 ms | 402 KiB | 454 Q