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<?php $str = '1 NM 2951-2 S Sodium: LN 144 mmol/L mmol/L 135-145 F 201402150533 2 NM 2823-3 S Potassium: LN 5.6 mmol/L mmol/L 3.5-5.5 H F 201402150533 3 NM 2075-0 S Chloride: LN 103 mmol/L mmol/L 95-110 F 201402150533'; echo preg_replace('/\b\d{12}\b(?!$)\K\s*/', '<br>', $str);
Output for git.master_jit, git.master, rfc.property-hooks
1 NM 2951-2 S Sodium: LN 144 mmol/L mmol/L 135-145 F 201402150533<br>2 NM 2823-3 S Potassium: LN 5.6 mmol/L mmol/L 3.5-5.5 H F 201402150533<br>3 NM 2075-0 S Chloride: LN 103 mmol/L mmol/L 95-110 F 201402150533

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