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<?php function test($str) { if (ltrim($str, 'A..Za..z0..9.') !== '') { return 'found a bad character'; } else { return 'all good'; } } foreach (['good', 'b@d', '$÷*'] as $s) { printf("%s : %s\n", $s, test($s)); }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
good : all good b@d : found a bad character $÷* : found a bad character

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