Online PHP editor | refs for gd91p

<?php $str = str_repeat("a\u{0308}bc", 1000); echo '$str = ', $str, "\n"; function test($name, $test) { $t = microtime(true); for ($i = 0; $i < 1000; ++$i) { $test(); } echo sprintf('%.6f', (microtime(true) - $t)), 's ', $name, "\n"; } foreach (["a\u{0308}bc", 'abc', str_repeat("a\u{0308}bc", 20).'a'] as $prefix) { echo "\n", '$prefix = ', $prefix, "\n"; test('grapheme_strpos', function () use ($str, $prefix) { return 0 === grapheme_strpos($str, $prefix); }); test('grapheme_substr', function () use ($str, $prefix) { return $prefix === grapheme_substr($str, 0, grapheme_strlen($prefix)); }); test('grapheme_extract', function () use ($str, $prefix) { return $prefix === grapheme_extract($str, strlen($prefix), GRAPHEME_EXTR_MAXBYTES); }); }