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<?php $string = "Hello {replace this curley} {{but not this one}} {{{and not this one}}}"; $formatted = preg_replace('/(?!\{{2,})(\{{1}|\}{1})/'," ",$string); var_dump($formatted);
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(71) "Hello replace this curley { but not this one {{ and not this one "
preferences:
219.03 ms | 404 KiB | 233 Q