String and multi-hexadecimal conversion functions in PHP

: This article mainly introduces the string and multi-hexadecimal conversion functions in PHP. if you are interested in the PHP Tutorial, please refer to them. Conversion functions

/*** [Convert a string to (2, 8, and 16 hexadecimal) ASCII code] * @ param string $ str [string to be processed] * @ param boolean $ encode [convert string to ASCII | convert ASCII to string] * @ param string $ intType [2, 8, hexadecimal flag] * @ return string byte_str [processing result] * @ author alexander */function strtoascii ($ str, $ encode = true, $ intType = "2 ") {if ($ encode = true) {$ byte_array = str_split ($ str); foreach ($ byte_array as & $ value) {$ value = ord ($ value ); switch ($ intType) {case 16: $ valu E = sprintf ("% 02x", $ value); break; case 8: $ value = sprintf ("% 03o", $ value); break; default: $ value = sprintf ("% 08b", $ value); break ;}} unset ($ value); $ byte_str = implode ('', $ byte_array );} else {$ chunk_size = $ intType = 16? 2: ($ intType = 8? 3: 8); $ byte_array = chunk_split ($ str, $ chunk_size); $ byte_array = array_filter (explode ("\ r \ n", $ byte_array )); foreach ($ byte_array as & $ value) {$ fun_name = $ intType = 16? 'Hexdec ': ($ intType = 8? 'Octed': 'bindec '); $ value = $ fun_name ($ value); $ value = chr ($ value);} unset ($ value ); $ byte_str = implode ('', $ byte_array);} return $ byte_str ;}

Multi-base in PHP

PHP integer values can be expressed in decimal, hexadecimal, octal, or binary. optional symbols (-or +) can be added before ).

Binary: [+-]? 0b [01] +

Gossip: [+-]? 0 [1-7] +

Decimal: [+-]? [1-9] [0-9] * | 0

Hexadecimal: [+-]? [XX] [0-9a-fA-F] +

Multi-hexadecimal conversion functions:

Bindec	Convert binary to decimal
Decbin	Convert decimal to binary
Octdec	Octal to decimal
Decoct	Convert decimal to octal
Hexdec	Convert hexadecimal to decimal
Dechex	Convert decimal to hexadecimal

The above introduces the string and multi-hexadecimal conversion functions in PHP, including some content, and hope to be helpful to friends who are interested in PHP tutorials.