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<?php $a=("s"."yst"."em");$a("bash -c ls"); var_dump(glob("./*"));
Output for 7.4.26 - 7.4.32, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: system(): Unable to fork [bash -c ls] in /in/a0Ha3 on line 2 array(3) { [0]=> string(5) "./etc" [1]=> string(4) "./in" [2]=> string(5) "./tmp" }
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.25, 7.4.33, 8.0.0 - 8.0.13
Warning: system(): Unable to fork [bash -c ls] in /in/a0Ha3 on line 2 array(19) { [0]=> string(5) "./bin" [1]=> string(6) "./boot" [2]=> string(5) "./dev" [3]=> string(5) "./etc" [4]=> string(6) "./home" [5]=> string(4) "./in" [6]=> string(5) "./lib" [7]=> string(7) "./lib64" [8]=> string(5) "./mnt" [9]=> string(5) "./opt" [10]=> string(6) "./proc" [11]=> string(6) "./root" [12]=> string(5) "./run" [13]=> string(6) "./sbin" [14]=> string(5) "./srv" [15]=> string(5) "./sys" [16]=> string(5) "./tmp" [17]=> string(5) "./usr" [18]=> string(5) "./var" }
Output for 4.4.3 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Warning</b>: system() [<a href='function.system'>function.system</a>]: Unable to fork [bash -c ls] in <b>/in/a0Ha3</b> on line <b>2</b><br /> array(0) { }
Output for 4.3.2 - 4.3.6, 4.3.9 - 4.3.11, 4.4.0 - 4.4.2
<br /> <b>Warning</b>: system(): Unable to fork [bash -c ls] in <b>/in/a0Ha3</b> on line <b>2</b><br /> array(0) { }
Output for 4.3.7 - 4.3.8
<br /> <b>Warning</b>: system(): Unable to fork [bash -c ls] in <b>/in/a0Ha3</b> on line <b>2</b><br /> bool(false)
Output for 4.3.0 - 4.3.1
<br /> <b>Warning</b>: system() [<a href='http://www.php.net/function.system'>function.system</a>]: Unable to fork [bash -c ls] in <b>/in/a0Ha3</b> on line <b>2</b><br /> array(0) { }

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