PHP converts a string of ASCII characters to a hexadecimal value function Bin2Hex ()

Convert "Hello world!" to a hexadecimal value:

<?php $str = Bin2Hex ("Hello world!"); Echo ($STR);?>

Definition and usage

The Bin2Hex () function converts a string of ASCII characters to a hexadecimal value. Strings can be converted back by using the pack () function.

Grammar

Bin2Hex (String)

Parameter description

string is required. Specifies the string to convert.

Technical details return value:

Returns the hexadecimal value of the string to be converted.

Convert a string value from binary to 16 and back again:

<?php$str = "Hello world!"; echo Bin2Hex ($STR). "<br>"; Echo Pack ("h*", Bin2Hex ($STR)). "<br>";? >

PHP has the Bin2Hex method, but there is no Hex2bin method, the following simple implementation hex2bin: <?phpfunction Hex2bin ($data) {     $len = strlen ($data);     Return Pack ("H". $len, $data); }?>

The function of PHP Bin2Hex () is to convert a string of ASCII characters to a hexadecimal value.

Bin2Hex Definition and usage

The AddAttribute () function adds an attribute to the SimpleXML element.

The function has no return value.

Grammar

Class simplexmlelement{string AddAttribute (Name,value,ns)}

Parameter description

Name is required. The name of the specified property.

Value is required. The value of the specified property.

NS is optional. Specifies the namespace of the attribute.

Bin2Hex instances

XML file:

<?xml version= "1.0" encoding= "iso-8859-1"? ><note><to>george</to><from>john</ From>
PHP Code:

<?php$xml = simplexml_load_file ("Test.xml"), $xml->body[0]->addattribute ("type", "small"); foreach ($xml- >body[0]->attributes () as $a + $b)  {  echo $a, ' = ' ', $b, ' ';  }? >
Output:

Type= "Small"