PHP Call to undefined function mb_strlen()

Tiago Cavalcante Trindade · 17 de março de 2020

Eu estou tentando usar a função mb_strlen().

O código do index.php:

<!DOCTYPE html>
<html lang="pt-BR">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Ex 13</title>
</head>
<body>
	<?php
		echo mb_strlen("áàªºçâãêõ", "UTF-8");
		echo "<br />";
	?>
</body>
</html>

Aqui está o resultado do phpinfo():


PHP Version 7.3.15
System 
Windows NT LAPTOP-18BR3O1I 10.0 build 18363 (Windows 10) AMD64 
Build Date 
Feb 18 2020 12:38:36 
Compiler 
MSVC15 (Visual C++ 2017) 
Architecture 
x64 
Configure Command 
cscript /nologo /e:jscript configure.js "--enable-snapshot-build" "--enable-debug-pack" "--with-pdo-oci=c:\php-snap-build\deps_aux\oracle\x64\instantclient_12_1\sdk,shared" "--with-oci8-12c=c:\php-snap-build\deps_aux\oracle\x64\instantclient_12_1\sdk,shared" "--enable-object-out-dir=../obj/" "--enable-com-dotnet=shared" "--without-analyzer" "--with-pgo" 
Server API 
Apache 2.0 Handler 
Virtual Directory Support 
enabled 
Configuration File (php.ini) Path 
C:\WINDOWS 
Loaded Configuration File 
(none) 
Scan this dir for additional .ini files 
(none) 
Additional .ini files parsed 
(none) 
PHP API 
20180731 
PHP Extension 
20180731 
Zend Extension 
320180731 
Zend Extension Build 
API320180731,TS,VC15 
PHP Extension Build 
API20180731,TS,VC15 
Debug Build 
no 
Thread Safety 
enabled 
Thread API 
Windows Threads 
Zend Signal Handling 
disabled 
Zend Memory Manager 
enabled 
Zend Multibyte Support 
disabled 
IPv6 Support 
enabled 
DTrace Support 
disabled 
Registered PHP Streams
php, file, glob, data, http, ftp, zip, compress.zlib, phar
Registered Stream Socket Transports
tcp, udp
Registered Stream Filters
convert.iconv.*, string.rot13, string.toupper, string.tolower, string.strip_tags, convert.*, consumed, dechunk, zlib.*
This program makes use of the Zend Scripting Language Engine:
Zend Engine v3.3.15, Copyright (c) 1998-2018 Zend Technologies

Configuration
apache2handler
Apache Version 
Apache/2.4.41 (Win64) PHP/7.3.15 
Apache API Version 
20120211 
Server Administrator 
[email protected] 
Hostname:Port 
localhost:80 
Max Requests 
Per Child: 0 - Keep Alive: on - Max Per Connection: 100 
Timeouts 
Connection: 60 - Keep-Alive: 5 
Virtual Server 
No 
Server Root 
D:/Arquivos/Downloads/Apache24 
Loaded Modules 
core mod_win32 mpm_winnt http_core mod_so mod_actions mod_alias mod_allowmethods mod_asis mod_auth_basic mod_authn_core mod_authn_file mod_authz_core mod_authz_groupfile mod_authz_host mod_authz_user mod_autoindex mod_cgi mod_dir mod_env mod_include mod_isapi mod_log_config mod_mime mod_negotiation mod_setenvif mod_php7 
Directive
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Master Value
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1
1
last_modified
0
0
xbithack
0
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Variable
Value
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HTTP_UPGRADE_INSECURE_REQUESTS 
1 
HTTP_USER_AGENT 
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HTTP_ACCEPT_ENCODING 
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Keep-Alive 
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http 
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no value 
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SERVER_ADMIN 
[email protected] 
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REMOTE_PORT 
50237 
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CGI/1.1 
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no value 
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HTTP Headers Information
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Referer 
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Accept 
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1 
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libxml Version 
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Master Value
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Additional Modules
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Environment
Variable
Value
no value 
D:=D:\Arquivos\Downloads\Apache24\htdocs 
ALLUSERSPROFILE 
C:\ProgramData 
APPDATA 
C:\Users\tiago\AppData\Roaming 
ChocolateyInstall 
C:\ProgramData\chocolatey 
ChocolateyLastPathUpdate 
132281865846578557 
CommonProgramFiles 
C:\Program Files\Common Files 
CommonProgramFiles(x86) 
C:\Program Files (x86)\Common Files 
CommonProgramW6432 
C:\Program Files\Common Files 
COMPUTERNAME 
LAPTOP-18BR3O1I 
ComSpec 
C:\WINDOWS\system32\cmd.exe 
DriverData 
C:\Windows\System32\Drivers\DriverData 
HOMEDRIVE 
C: 
HOMEPATH 
\Users\tiago 
KALI 
C:\Users\tiago\AppData\Local\Packages\KaliLinux.54290C8133FEE_ey8k8hqnwqnmg\LocalState\rootfs 
LOCALAPPDATA 
C:\Users\tiago\AppData\Local 
LOGONSERVER 
\\LAPTOP-18BR3O1I 
NUMBER_OF_PROCESSORS 
8 
OneDrive 
C:\Users\tiago\OneDrive 
OneDriveConsumer 
C:\Users\tiago\OneDrive 
OS 
Windows_NT 
Path 
C:\Program Files (x86)\Embarcadero\Studio\20.0\bin;C:\Users\Public\Documents\Embarcadero\Studio\20.0\Bpl;C:\Program Files (x86)\Embarcadero\Studio\20.0\bin64;C:\Users\Public\Documents\Embarcadero\Studio\20.0\Bpl\Win64;C:\ProgramData\Oracle\Java\javapath;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\windows\System32\OpenSSH\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\dotnet\;C:\Users\tiago\AppData\Local\Microsoft\WindowsApps;C:\Users\tiago\adb-fastboot\platform-tools;C:\adb;C:\Program Files\nodejs\;C:\ProgramData\chocolatey\bin;C:\Users\tiago\AppData\Local\Microsoft\WindowsApps;C:\Users\tiago\adb-fastboot\platform-tools;C:\Users\tiago\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\Scripts;C:\Users\tiago\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\tiago\AppData\Roaming\npm;C:\Program Files\Java\jre1.8.0_111\bin;C:\Program Files\Git\bin\;D:\Arquivos\Downloads\php;C:\Program Files\MySQL\MySQL Server 8.0\bin;D:\Arquivos\Downloads\Apache24\bin; 
PATHEXT 
.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC 
PROCESSOR_ARCHITECTURE 
AMD64 
PROCESSOR_IDENTIFIER 
Intel64 Family 6 Model 142 Stepping 11, GenuineIntel 
PROCESSOR_LEVEL 
6 
PROCESSOR_REVISION 
8e0b 
ProgramData 
C:\ProgramData 
ProgramFiles 
C:\Program Files 
ProgramFiles(x86) 
C:\Program Files (x86) 
ProgramW6432 
C:\Program Files 
prompt 
$E[032m$P$E[34m$S$$$E[0m$S 
PSModulePath 
C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules 
PUBLIC 
C:\Users\Public 
SESSIONNAME 
Console 
SystemDrive 
C: 
SystemRoot 
C:\WINDOWS 
TEMP 
C:\Users\tiago\AppData\Local\Temp 
TMP 
C:\Users\tiago\AppData\Local\Temp 
USERDOMAIN 
LAPTOP-18BR3O1I 
USERDOMAIN_ROAMINGPROFILE 
LAPTOP-18BR3O1I 
USERNAME 
tiago 
USERPROFILE 
C:\Users\tiago 
windir 
C:\WINDOWS 
TERM_PROGRAM 
vscode 
TERM_PROGRAM_VERSION 
1.43.0 
LANG 
pt_BR.UTF-8 
COLORTERM 
truecolor 
AP_PARENT_PID 
12100 
PHP Variables
Variable
Value
$_SERVER['HTTP_REFERER']
http://localhost/
$_SERVER['HTTP_ACCEPT']
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
$_SERVER['HTTP_ACCEPT_LANGUAGE']
pt-BR
$_SERVER['HTTP_UPGRADE_INSECURE_REQUESTS']
1
$_SERVER['HTTP_USER_AGENT']
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.18363
$_SERVER['HTTP_ACCEPT_ENCODING']
gzip, deflate
$_SERVER['HTTP_HOST']
localhost
$_SERVER['HTTP_CONNECTION']
Keep-Alive
$_SERVER['PATH']
C:\Program Files (x86)\Embarcadero\Studio\20.0\bin;C:\Users\Public\Documents\Embarcadero\Studio\20.0\Bpl;C:\Program Files (x86)\Embarcadero\Studio\20.0\bin64;C:\Users\Public\Documents\Embarcadero\Studio\20.0\Bpl\Win64;C:\ProgramData\Oracle\Java\javapath;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\windows\System32\OpenSSH\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\dotnet\;C:\Users\tiago\AppData\Local\Microsoft\WindowsApps;C:\Users\tiago\adb-fastboot\platform-tools;C:\adb;C:\Program Files\nodejs\;C:\ProgramData\chocolatey\bin;C:\Users\tiago\AppData\Local\Microsoft\WindowsApps;C:\Users\tiago\adb-fastboot\platform-tools;C:\Users\tiago\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\Scripts;C:\Users\tiago\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\tiago\AppData\Roaming\npm;C:\Program Files\Java\jre1.8.0_111\bin;C:\Program Files\Git\bin\;D:\Arquivos\Downloads\php;C:\Program Files\MySQL\MySQL Server 8.0\bin;D:\Arquivos\Downloads\Apache24\bin;
$_SERVER['SystemRoot']
C:\WINDOWS
$_SERVER['COMSPEC']
C:\WINDOWS\system32\cmd.exe
$_SERVER['PATHEXT']
.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
$_SERVER['WINDIR']
C:\WINDOWS
$_SERVER['SERVER_SIGNATURE']
no value
$_SERVER['SERVER_SOFTWARE']
Apache/2.4.41 (Win64) PHP/7.3.15
$_SERVER['SERVER_NAME']
localhost
$_SERVER['SERVER_ADDR']
::1
$_SERVER['SERVER_PORT']
80
$_SERVER['REMOTE_ADDR']
::1
$_SERVER['DOCUMENT_ROOT']
D:/Arquivos/Downloads/Apache24/htdocs
$_SERVER['REQUEST_SCHEME']
http
$_SERVER['CONTEXT_PREFIX']
no value
$_SERVER['CONTEXT_DOCUMENT_ROOT']
D:/Arquivos/Downloads/Apache24/htdocs
$_SERVER['SERVER_ADMIN']
[email protected]
$_SERVER['SCRIPT_FILENAME']
D:/Arquivos/Downloads/Apache24/htdocs/ex14/index.php
$_SERVER['REMOTE_PORT']
50237
$_SERVER['GATEWAY_INTERFACE']
CGI/1.1
$_SERVER['SERVER_PROTOCOL']
HTTP/1.1
$_SERVER['REQUEST_METHOD']
GET
$_SERVER['QUERY_STRING']
no value
$_SERVER['REQUEST_URI']
/ex14/
$_SERVER['SCRIPT_NAME']
/ex14/index.php
$_SERVER['PHP_SELF']
/ex14/index.php
$_SERVER['REQUEST_TIME_FLOAT']
1584403218.554
$_SERVER['REQUEST_TIME']
1584403218
$_SERVER['argv']
Array
(
)
$_SERVER['argc']
0
$_ENV['ALLUSERSPROFILE']
C:\ProgramData
$_ENV['APPDATA']
C:\Users\tiago\AppData\Roaming
$_ENV['ChocolateyInstall']
C:\ProgramData\chocolatey
$_ENV['ChocolateyLastPathUpdate']
132281865846578557
$_ENV['CommonProgramFiles']
C:\Program Files\Common Files
$_ENV['CommonProgramFiles(x86)']
C:\Program Files (x86)\Common Files
$_ENV['CommonProgramW6432']
C:\Program Files\Common Files
$_ENV['COMPUTERNAME']
LAPTOP-18BR3O1I
$_ENV['ComSpec']
C:\WINDOWS\system32\cmd.exe
$_ENV['DriverData']
C:\Windows\System32\Drivers\DriverData
$_ENV['HOMEDRIVE']
C:
$_ENV['HOMEPATH']
\Users\tiago
$_ENV['KALI']
C:\Users\tiago\AppData\Local\Packages\KaliLinux.54290C8133FEE_ey8k8hqnwqnmg\LocalState\rootfs
$_ENV['LOCALAPPDATA']
C:\Users\tiago\AppData\Local
$_ENV['LOGONSERVER']
\\LAPTOP-18BR3O1I
$_ENV['NUMBER_OF_PROCESSORS']
8
$_ENV['OneDrive']
C:\Users\tiago\OneDrive
$_ENV['OneDriveConsumer']
C:\Users\tiago\OneDrive
$_ENV['OS']
Windows_NT
$_ENV['Path']
C:\Program Files (x86)\Embarcadero\Studio\20.0\bin;C:\Users\Public\Documents\Embarcadero\Studio\20.0\Bpl;C:\Program Files (x86)\Embarcadero\Studio\20.0\bin64;C:\Users\Public\Documents\Embarcadero\Studio\20.0\Bpl\Win64;C:\ProgramData\Oracle\Java\javapath;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\windows\System32\OpenSSH\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\dotnet\;C:\Users\tiago\AppData\Local\Microsoft\WindowsApps;C:\Users\tiago\adb-fastboot\platform-tools;C:\adb;C:\Program Files\nodejs\;C:\ProgramData\chocolatey\bin;C:\Users\tiago\AppData\Local\Microsoft\WindowsApps;C:\Users\tiago\adb-fastboot\platform-tools;C:\Users\tiago\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\Scripts;C:\Users\tiago\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\tiago\AppData\Roaming\npm;C:\Program Files\Java\jre1.8.0_111\bin;C:\Program Files\Git\bin\;D:\Arquivos\Downloads\php;C:\Program Files\MySQL\MySQL Server 8.0\bin;D:\Arquivos\Downloads\Apache24\bin;
$_ENV['PATHEXT']
.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
$_ENV['PROCESSOR_ARCHITECTURE']
AMD64
$_ENV['PROCESSOR_IDENTIFIER']
Intel64 Family 6 Model 142 Stepping 11, GenuineIntel
$_ENV['PROCESSOR_LEVEL']
6
$_ENV['PROCESSOR_REVISION']
8e0b
$_ENV['ProgramData']
C:\ProgramData
$_ENV['ProgramFiles']
C:\Program Files
$_ENV['ProgramFiles(x86)']
C:\Program Files (x86)
$_ENV['ProgramW6432']
C:\Program Files
$_ENV['prompt']
$E[032m$P$E[34m$S$$$E[0m$S
$_ENV['PSModulePath']
C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules
$_ENV['PUBLIC']
C:\Users\Public
$_ENV['SESSIONNAME']
Console
$_ENV['SystemDrive']
C:
$_ENV['SystemRoot']
C:\WINDOWS
$_ENV['TEMP']
C:\Users\tiago\AppData\Local\Temp
$_ENV['TMP']
C:\Users\tiago\AppData\Local\Temp
$_ENV['USERDOMAIN']
LAPTOP-18BR3O1I
$_ENV['USERDOMAIN_ROAMINGPROFILE']
LAPTOP-18BR3O1I
$_ENV['USERNAME']
tiago
$_ENV['USERPROFILE']
C:\Users\tiago
$_ENV['windir']
C:\WINDOWS
$_ENV['TERM_PROGRAM']
vscode
$_ENV['TERM_PROGRAM_VERSION']
1.43.0
$_ENV['LANG']
pt_BR.UTF-8
$_ENV['COLORTERM']
truecolor
$_ENV['AP_PARENT_PID']
12100

PHP Credits
PHP Group
Thies C. Arntzen, Stig Bakken, Shane Caraveo, Andi Gutmans, Rasmus Lerdorf, Sam Ruby, Sascha Schumann, Zeev Suraski, Jim Winstead, Andrei Zmievski 
Language Design & Concept
Andi Gutmans, Rasmus Lerdorf, Zeev Suraski, Marcus Boerger 
PHP Authors
Contribution
Authors
Zend Scripting Language Engine 
Andi Gutmans, Zeev Suraski, Stanislav Malyshev, Marcus Boerger, Dmitry Stogov, Xinchen Hui, Nikita Popov 
Extension Module API 
Andi Gutmans, Zeev Suraski, Andrei Zmievski 
UNIX Build and Modularization 
Stig Bakken, Sascha Schumann, Jani Taskinen 
Windows Support 
Shane Caraveo, Zeev Suraski, Wez Furlong, Pierre-Alain Joye, Anatol Belski, Kalle Sommer Nielsen 
Server API (SAPI) Abstraction Layer 
Andi Gutmans, Shane Caraveo, Zeev Suraski 
Streams Abstraction Layer 
Wez Furlong, Sara Golemon 
PHP Data Objects Layer 
Wez Furlong, Marcus Boerger, Sterling Hughes, George Schlossnagle, Ilia Alshanetsky 
Output Handler 
Zeev Suraski, Thies C. Arntzen, Marcus Boerger, Michael Wallner 
Consistent 64 bit support 
Anthony Ferrara, Anatol Belski 
SAPI Modules
Contribution
Authors
Apache 2.0 Handler 
Ian Holsman, Justin Erenkrantz (based on Apache 2.0 Filter code) 
CGI / FastCGI 
Rasmus Lerdorf, Stig Bakken, Shane Caraveo, Dmitry Stogov 
CLI 
Edin Kadribasic, Marcus Boerger, Johannes Schlueter, Moriyoshi Koizumi, Xinchen Hui 
Embed 
Edin Kadribasic 
FastCGI Process Manager 
Andrei Nigmatulin, dreamcat4, Antony Dovgal, Jerome Loyet 
litespeed 
George Wang 
phpdbg 
Felipe Pena, Joe Watkins, Bob Weinand 
Module Authors
Module
Authors
BC Math 
Andi Gutmans 
Bzip2 
Sterling Hughes 
Calendar 
Shane Caraveo, Colin Viebrock, Hartmut Holzgraefe, Wez Furlong 
COM and .Net 
Wez Furlong 
ctype 
Hartmut Holzgraefe 
cURL 
Sterling Hughes 
Date/Time Support 
Derick Rethans 
DB-LIB (MS SQL, Sybase) 
Wez Furlong, Frank M. Kromann, Adam Baratz 
DBA 
Sascha Schumann, Marcus Boerger 
DOM 
Christian Stocker, Rob Richards, Marcus Boerger 
enchant 
Pierre-Alain Joye, Ilia Alshanetsky 
EXIF 
Rasmus Lerdorf, Marcus Boerger 
fileinfo 
Ilia Alshanetsky, Pierre Alain Joye, Scott MacVicar, Derick Rethans, Anatol Belski 
Firebird driver for PDO 
Ard Biesheuvel 
FTP 
Stefan Esser, Andrew Skalski 
GD imaging 
Rasmus Lerdorf, Stig Bakken, Jim Winstead, Jouni Ahto, Ilia Alshanetsky, Pierre-Alain Joye, Marcus Boerger 
GetText 
Alex Plotnick 
GNU GMP support 
Stanislav Malyshev 
Iconv 
Rui Hirokawa, Stig Bakken, Moriyoshi Koizumi 
IMAP 
Rex Logan, Mark Musone, Brian Wang, Kaj-Michael Lang, Antoni Pamies Olive, Rasmus Lerdorf, Andrew Skalski, Chuck Hagenbuch, Daniel R Kalowsky 
Input Filter 
Rasmus Lerdorf, Derick Rethans, Pierre-Alain Joye, Ilia Alshanetsky 
InterBase 
Jouni Ahto, Andrew Avdeev, Ard Biesheuvel 
Internationalization 
Ed Batutis, Vladimir Iordanov, Dmitry Lakhtyuk, Stanislav Malyshev, Vadim Savchuk, Kirti Velankar 
JSON 
Jakub Zelenka, Omar Kilani, Scott MacVicar 
LDAP 
Amitay Isaacs, Eric Warnke, Rasmus Lerdorf, Gerrit Thomson, Stig Venaas 
LIBXML 
Christian Stocker, Rob Richards, Marcus Boerger, Wez Furlong, Shane Caraveo 
Multibyte String Functions 
Tsukada Takuya, Rui Hirokawa 
MySQL driver for PDO 
George Schlossnagle, Wez Furlong, Ilia Alshanetsky, Johannes Schlueter 
MySQLi 
Zak Greant, Georg Richter, Andrey Hristov, Ulf Wendel 
MySQLnd 
Andrey Hristov, Ulf Wendel, Georg Richter, Johannes Schlüter 
OCI8 
Stig Bakken, Thies C. Arntzen, Andy Sautins, David Benson, Maxim Maletsky, Harald Radi, Antony Dovgal, Andi Gutmans, Wez Furlong, Christopher Jones, Oracle Corporation 
ODBC driver for PDO 
Wez Furlong 
ODBC 
Stig Bakken, Andreas Karajannis, Frank M. Kromann, Daniel R. Kalowsky 
Opcache 
Andi Gutmans, Zeev Suraski, Stanislav Malyshev, Dmitry Stogov, Xinchen Hui 
OpenSSL 
Stig Venaas, Wez Furlong, Sascha Kettler, Scott MacVicar 
Oracle (OCI) driver for PDO 
Wez Furlong 
pcntl 
Jason Greene, Arnaud Le Blanc 
Perl Compatible Regexps 
Andrei Zmievski 
PHP Archive 
Gregory Beaver, Marcus Boerger 
PHP Data Objects 
Wez Furlong, Marcus Boerger, Sterling Hughes, George Schlossnagle, Ilia Alshanetsky 
PHP hash 
Sara Golemon, Rasmus Lerdorf, Stefan Esser, Michael Wallner, Scott MacVicar 
Posix 
Kristian Koehntopp 
PostgreSQL driver for PDO 
Edin Kadribasic, Ilia Alshanetsky 
PostgreSQL 
Jouni Ahto, Zeev Suraski, Yasuo Ohgaki, Chris Kings-Lynne 
Pspell 
Vlad Krupin 
Readline 
Thies C. Arntzen 
Recode 
Kristian Koehntopp 
Reflection 
Marcus Boerger, Timm Friebe, George Schlossnagle, Andrei Zmievski, Johannes Schlueter 
Sessions 
Sascha Schumann, Andrei Zmievski 
Shared Memory Operations 
Slava Poliakov, Ilia Alshanetsky 
SimpleXML 
Sterling Hughes, Marcus Boerger, Rob Richards 
SNMP 
Rasmus Lerdorf, Harrie Hazewinkel, Mike Jackson, Steven Lawrance, Johann Hanne, Boris Lytochkin 
SOAP 
Brad Lafountain, Shane Caraveo, Dmitry Stogov 
Sockets 
Chris Vandomelen, Sterling Hughes, Daniel Beulshausen, Jason Greene 
Sodium 
Frank Denis 
SPL 
Marcus Boerger, Etienne Kneuss 
SQLite 3.x driver for PDO 
Wez Furlong 
SQLite3 
Scott MacVicar, Ilia Alshanetsky, Brad Dewar 
System V Message based IPC 
Wez Furlong 
System V Semaphores 
Tom May 
System V Shared Memory 
Christian Cartus 
tidy 
John Coggeshall, Ilia Alshanetsky 
tokenizer 
Andrei Zmievski, Johannes Schlueter 
WDDX 
Andrei Zmievski 
XML 
Stig Bakken, Thies C. Arntzen, Sterling Hughes 
XMLReader 
Rob Richards 
xmlrpc 
Dan Libby 
XMLWriter 
Rob Richards, Pierre-Alain Joye 
XSL 
Christian Stocker, Rob Richards 
Zip 
Pierre-Alain Joye, Remi Collet 
Zlib 
Rasmus Lerdorf, Stefan Roehrich, Zeev Suraski, Jade Nicoletti, Michael Wallner 
PHP Documentation
Authors 
Mehdi Achour, Friedhelm Betz, Antony Dovgal, Nuno Lopes, Hannes Magnusson, Philip Olson, Georg Richter, Damien Seguy, Jakub Vrana, Adam Harvey 
Editor 
Peter Cowburn 
User Note Maintainers 
Daniel P. Brown, Thiago Henrique Pojda 
Other Contributors 
Previously active authors, editors and other contributors are listed in the manual. 
PHP Quality Assurance Team
Ilia Alshanetsky, Joerg Behrens, Antony Dovgal, Stefan Esser, Moriyoshi Koizumi, Magnus Maatta, Sebastian Nohn, Derick Rethans, Melvyn Sopacua, Pierre-Alain Joye, Dmitry Stogov, Felipe Pena, David Soria Parra, Stanislav Malyshev, Julien Pauli, Stephen Zarkos, Anatol Belski, Remi Collet, Ferenc Kovacs 
Websites and Infrastructure team
PHP Websites Team 
Rasmus Lerdorf, Hannes Magnusson, Philip Olson, Lukas Kahwe Smith, Pierre-Alain Joye, Kalle Sommer Nielsen, Peter Cowburn, Adam Harvey, Ferenc Kovacs, Levi Morrison 
Event Maintainers 
Damien Seguy, Daniel P. Brown 
Network Infrastructure 
Daniel P. Brown 
Windows Infrastructure 
Alex Schoenmaker 
PHP License
This program is free software; you can redistribute it and/or modify it under the terms of the PHP License as published by the PHP Group and included in the distribution in the file: LICENSE 
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
If you did not receive a copy of the PHP license, or have any questions about PHP licensing, please contact [email protected].

Luís Roberto C. da Silva · 19 de março de 2020

E qual o erro? Qual o problema? O mb_strlen() retorna o tamanho da string em inteiros. O que quer exatamente?

Tiago Cavalcante Trindade · 19 de março de 2020

@Luís Roberto C. da Silva quando eu executo o comando mb_string eu recebo o seguinte erro:

Fatal error: Uncaught Error: Call to undefined function mb_string() in D:\Arquivos\Downloads\Apache24\htdocs\teste\index.php:10 Stack trace: #0 {main} thrown in D:\Arquivos\Downloads\Apache24\htdocs\teste\index.php on line 10

Fatal error: Uncaught Error: Call to undefined function mb_string() in D:\Arquivos\Downloads\Apache24\htdocs\teste\index.php:10 Stack trace: #0 {main} thrown in D:\Arquivos\Downloads\Apache24\htdocs\teste\index.php on line 10

Sendo que eu já ativei o mbstring no phi.ini.