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<?php $text = 'Some text at the start {{if|service_name=DJ Booth}} This is the text for DJs {{endif}} Some text in the middle {{if|service_name=Dancefloor Hire}} This is the text for dancefloor hire {{endif}} Some text at the end'; $service = "Dancefloor Hire"; echo preg_replace(["/{{if\|service_name=$service}}\s*(.*?)\R{{endif}}/s", "/\R?{{if.*?}}.*?{{endif}}\R?/s"], ["$1", ""], $text);
Output for 5.6.38, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Some text at the start Some text in the middle This is the text for dancefloor hire Some text at the end

preferences:
46.33 ms | 408 KiB | 5 Q