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<?php $str="prijs=0,209&orderby=price&order=undefined&posts_per_page=undefined"; $repl=['=', ',', '&']; $with=['[', '],[', ']],[']; $str='[' . preg_replace($repl, $with, $str) . ']'; var_dump(eval($str));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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
Warning: preg_replace(): No ending delimiter '=' found in /in/r4CSs on line 7 Parse error: syntax error, unexpected end of file in /in/r4CSs(9) : eval()'d code on line 1
Process exited with code 255.
Output for 5.4.11 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Warning: preg_replace(): No ending delimiter '=' found in /in/r4CSs on line 7 Parse error: syntax error, unexpected end of file in /in/r4CSs(9) : eval()'d code on line 1 bool(false)
Output for 5.4.0 - 5.4.10
Warning: preg_replace(): No ending delimiter '=' found in /in/r4CSs on line 7 Parse error: syntax error, unexpected end of file in /in/r4CSs(9) : eval()'d code on line 1 bool(false)
Process exited with code 255.
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/r4CSs on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected '[' in <b>/in/r4CSs</b> on line <b>4</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
<br /> <b>Parse error</b>: parse error, unexpected '[' in <b>/in/r4CSs</b> on line <b>4</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/r4CSs</b> on line <b>4</b><br />
Process exited with code 255.

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