I'm writing a php extension using c++. The c++ function signature is:
bool validateAndNormalizeStr (string& str)
Here 'str' is a in-out parameter. It's value would be updated in the function.
I hope the php function has the same signature. Here is a use case:
$str = " zh-hans-cn";
$ret = validateAndNormalizeStr($str);
if($ret)
{
echo $str;
}
I hope the output is： "zh-Hans-CN".
The problem is I haven't found any document about in-out parameter handling in writing php extension. Help!!!
Thanks
Related
Setting up an App that should put Ads over images and I'm getting this WordPress error when running the code and it's been a frustrating week trying to fix this thing.
function cwali_json_encode_utf8callback($matches){
return html_entity_decode('&#x' . $matches[1] . ';', ENT_COMPAT, 'UTF-8');
}
function cwali_json_encode_utf8($json)
{
return preg_replace_callback('/\\\\u(\w{4})/', cwali_json_encode_utf8callback($matches), json_encode($json));
}
I expect it to work but it gives me the following error : Warning: preg_replace_callback(): Requires argument 2, '&#x;', to be a valid callback.
If someone could please come up with a solution, that would be amazing, thank you so much!
In your call
preg_replace_callback('/\\\\u(\w{4})/', cwali_json_encode_utf8callback($matches), json_encode($json));
instead of passing the callback function, you call the function, so its return value is passed as the argument. Try
preg_replace_callback('/\\\\u(\w{4})/', 'cwali_json_encode_utf8callback', json_encode($json));
There's a following function written in VBA.NET which I'm trying convert to PHP. I'm primarly a PHP developer, and I have alsmost zero-knowledge in VB.
<%
Public Shared Function ComputeHash(ByVal Key As String) As String
Dim objSHA1 As New SHA1CryptoServiceProvider
objSHA1.ComputeHash(System.Text.Encoding.UTF8.GetBytes(Key.ToCharArray))
Dim buffer() As Byte = objSHA1.Hash
Dim HashValue As String = System.Convert.ToBase64String(buffer)
Return HashValue
End Function
%>
I have tried searching for manuals and found some guidelances.
This is so far what I have converted to PHP myself:
function compute_hash($string){
return base64_encode(sha1($string));
}
Hovewer it doesn't produce the same result as VB's function ComputeHash(). Coudn't someone tell what I'm doing wrong?
Example of execution on both languages:
VBA.NET
string = "orange45877687459999SENTRYORD01154321"
ComputeHash(string) // Returns = WbwSWEBzPqgo9C4nZmGwHhd/FBQ=
PHP
$string = "orange45877687459999SENTRYORD01154321";
compute_hash(string) // Returns = NTliYzEyNTg0MDczM2VhODI4ZjQyZTI3NjY2MWIwMWUxNzdmMTQxNA== (but I need "WbwSWEBzPqgo9C4nZmGwHhd/FBQ=")
You need to instruct PHP to return the SHA1-hash in bytes instead of in hex format, by passing the TRUE parameter to the hashing function:
function compute_hash($string){
return base64_encode(sha1($string, TRUE));
}
PHP manual for SHA1
I'm working on creating a class for xml parsing, and need to use this method from PHP called xml_parse.
It has 3 parameters like so:
int xml_parse ( resource $parser , string $data [, bool $is_final = false ] )
According to the PHP manual is_final it means whether its the last piece of data sent in this parse, but what does this mean? does this something have to do with resource $parser? as far as I'm aware this function does not allow an input stream of data, thus my confusion.
Someone please explain what it does
is_final means that if you are parsing the last line of your $data you must set this parameter to true.
in addition there is a note in the Doc :
Entity errors are reported at the end of the parse. And will only show if the "end" parameter is TRUE
See the sample below from w3schools
<?php
$parser=xml_parser_create();
function char($parser,$data)
{
echo $data;
}
xml_set_character_data_handler($parser,"char");
$fp=fopen("test.xml","r");
while ($data=fread($fp,4096))
{
xml_parse($parser,$data,feof($fp)) or
die (sprintf("XML Error: %s at line %d",
xml_error_string(xml_get_error_code($parser)),
xml_get_current_line_number($parser)));
}
xml_parser_free($parser);
?>
I am converting .net project to PHP . But unable to convert the following code:
public static string HashString(string value)
{
SHA1 hasher = new SHA1CryptoServiceProvider();
UTF8Encoding enc = new UTF8Encoding();
byte[] hashInBytes = hasher.ComputeHash(enc.GetBytes(value));
return Convert.ToBase64String(hashInBytes);
}
So far I have done this but result is not same:
function HashString($str) {
return base64_encode(sha1($str));
}
Please help, thanks.
The reason behind the difference is, PHP uses ASCII encoding for hash calculations.
In C#, you can replace UTF8Encoding with ASCIIEncoding in order to have same results.
Finally I found the solution:
This is the final code which is equivalent to .net code:
function HashString($str) {
return base64_encode(sha1($str,true));
}
I have added "true" with sha1 function.
I'm using the python hashlib to get a condensed md5 value using the following command, can someone help me out with a compatible function?
hashlib.md5('my string').hexdigest()
$string = 'my string'
$encoded_string = md5($string);
echo md5('apple');
// => 1f3870be274f6c49b3e31a0c6728957f
produces the same result as
require 'digest/md5';
print Digest::MD5.hexdigest('apple');
# => 1f3870be274f6c49b3e31a0c6728957f