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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);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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
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 - 5.5.38, 5.6.0 - 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 - 5.4.45, 5.5.0 - 5.5.34
string(4) "" array(1) { [1]=> int(0) } 16
preferences:
192.88 ms | 402 KiB | 271 Q