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run code in 200+ php & hhvm versions
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<?php $textData = pack("N", 'wwwwwwwwwwwwwwwwsss'); var_dump($textData); $textData = unpack("N",$textData); var_dump($textData); echo mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CFB);
based on ThZ3e
Output for 7.0.0 - 7.2.0
string(4) "" array(1) { [1]=> int(0) } Fatal error: Uncaught Error: Call to undefined function mcrypt_get_iv_size() in /in/dJLNg:6 Stack trace: #0 {main} thrown in /in/dJLNg on line 6
Process exited with code 255.
Output for 5.5.35 - 5.6.28
string(4) "" array(1) { [1]=> int(0) } Fatal error: Call to undefined function mcrypt_get_iv_size() in /in/dJLNg on line 6
Process exited with code 255.
Output for 5.4.0 - 5.5.34
string(4) "" array(1) { [1]=> int(0) } 16