Created
February 24, 2019 14:43
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hex_dump function to see the hexa of a string
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| <?php | |
| /** | |
| * I'm not the author of this, you can find this function on stackoverflow | |
| * So a big thanks to the author, this function save me many times :) | |
| * | |
| * @link https://stackoverflow.com/questions/1057572/how-can-i-get-a-hex-dump-of-a-string-in-php | |
| */ | |
| /** | |
| * Dumps a string into a traditional hex dump for programmers, | |
| * in a format similar to the output of the BSD command hexdump -C file. | |
| * The default result is a string. | |
| * Supported options: | |
| * <pre> | |
| * line_sep - line seperator char, default = "\n" | |
| * bytes_per_line - default = 16 | |
| * pad_char - character to replace non-readble characters with, default = '.' | |
| * </pre> | |
| * | |
| * @param string $string | |
| * @param array $options | |
| * @param string|array | |
| * | |
| * @return string | |
| */ | |
| function hex_dump($string, array $options = null) { | |
| if (!is_scalar($string)) { | |
| throw new InvalidArgumentException('$string argument must be a string'); | |
| } | |
| if (!is_array($options)) { | |
| $options = array(); | |
| } | |
| $line_sep = isset($options['line_sep']) ? $options['line_sep'] : "\n"; | |
| $bytes_per_line = @$options['bytes_per_line'] ? $options['bytes_per_line'] : 16; | |
| $pad_char = isset($options['pad_char']) ? $options['pad_char'] : '.'; # padding for non-readable characters | |
| $text_lines = str_split($string, $bytes_per_line); | |
| $hex_lines = str_split(bin2hex($string), $bytes_per_line * 2); | |
| $offset = 0; | |
| $output = array(); | |
| $bytes_per_line_div_2 = (int)($bytes_per_line / 2); | |
| foreach ($hex_lines as $i => $hex_line) { | |
| $text_line = $text_lines[$i]; | |
| $output []= | |
| sprintf('%08X',$offset) . ' ' . | |
| str_pad( | |
| strlen($text_line) > $bytes_per_line_div_2 | |
| ? | |
| implode(' ', str_split(substr($hex_line,0,$bytes_per_line),2)) . ' ' . | |
| implode(' ', str_split(substr($hex_line,$bytes_per_line),2)) | |
| : | |
| implode(' ', str_split($hex_line,2)) | |
| , $bytes_per_line * 3) . | |
| ' |' . preg_replace('/[^\x20-\x7E]/', $pad_char, $text_line) . '|'; | |
| $offset += $bytes_per_line; | |
| } | |
| $output []= sprintf('%08X', strlen($string)); | |
| return @$options['want_array'] ? $output : join($line_sep, $output) . $line_sep; | |
| } |
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