3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = ' \uparrow \Uparrow [ ] \downarrow \Downarrow \{ \} \updownarrow \Updownarrow \lfloor \rfloor \lceil \rceil \langle \rangle / \backslash | \| '; $x = array_filter(preg_split('/\s+/', $x)); usort($x, function ($a, $b) { return strcmp(strtolower($a), strtolower($b)); }); foreach ($x as $xx) { echo $xx, "\n"; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
/ [ \backslash \downarrow \Downarrow \langle \lceil \lfloor \rangle \rceil \rfloor \uparrow \Uparrow \updownarrow \Updownarrow \{ \| \} ] |
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
/ [ \backslash \downarrow \Downarrow \langle \lceil \lfloor \rangle \rceil \rfloor \uparrow \Uparrow \Updownarrow \updownarrow \{ \| \} ] |
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
/ [ \backslash \Downarrow \downarrow \langle \lceil \lfloor \rangle \rceil \rfloor \Uparrow \uparrow \Updownarrow \updownarrow \{ \| \} ] |
preferences:
239.14 ms | 402 KiB | 334 Q