Sekunda z AI, może tu coś znajdziesz. IMO i tak tak, czy siak, musisz to wszystko zaktualizować do 8.x minimum (chyba teraz minimum to 8.2, rekomendowane 8.4):
Yes, there are significant differences in how character sets and national characters are handled between these eras, primarily driven by a massive overhaul introduced in PHP 5.6. [1]
(Note: There is no official "PHP 5.7" release, as development jumped straight from 5.6 to PHP 7.0. The changes detailed below apply to PHP 5.6 and all subsequent versions). [1]
Key Differences at a Glance
Feature / Behavior
PHP < 5.5
PHP 5.6+ (and later)
Default default_charset
Empty or ISO-8859-1
UTF-8
htmlspecialchars() Default
ISO-8859-1 (varies by sub-version)
UTF-8
htmlentities() Default
ISO-8859-1
UTF-8
HTTP Content-Type Header
Sent without charset unless forced
Sent automatically as text/html; charset=UTF-8
Extension Encodings
Separate configuration options needed
Consolidated under default_charset
Detailed Breakdown of the Changes
1. The Global Shift to UTF-8
In PHP versions older than 5.5, PHP was mostly agnostic to encodings by default, or assumed Western European ISO-8859-1 (Latin-1). Starting in PHP 5.6, UTF-8 became the universal internal default. [1, 2, 3, 4]
2. Automatic HTTP Headers
Starting with PHP 5.6, if you do not explicitly set an HTTP content-type header, PHP will automatically inject Content-Type: text/html; charset=UTF-8. In older versions, it simply sent text/html, leaving the browser to guess the encoding or fall back to its own localized defaults. [1]
3. Behavioral Changes in String Functions
Functions like htmlspecialchars() and htmlentities() rely heavily on the default character set: [1, 2]
In older PHP versions: If you passed national characters (like ä, ñ, ś, or я) to these functions without specifying an explicit encoding argument, they assumed Latin-1. [1, 2]
In newer PHP versions: They assume UTF-8. If your legacy code passes an older single-byte string (like a Windows-1250 or ISO-8859-2 string) to these functions, they will return an empty string or garbled data because the input is invalid UTF-8. [1]
4. Streamlining Multi-byte Extensions
Previously, dealing with multi-byte national characters required managing separate, conflicting configuration rules across various tools. In 5.6+, the following deprecated, module-specific php.ini directives were consolidated under the unified default_charset: [1, 2]
iconv.input_encoding, iconv.internal_encoding, and iconv.output_encoding
mbstring.http_input, mbstring.http_output, and mbstring.internal_encoding [1]
Impact on Databases
If you are upgrading legacy code, remember that older PHP-to-MySQL environments often relied implicitly on latin1 connections. Moving forward, you must explicitly tell database extensions like PDO or mysqli to use UTF-8 (preferably utf8mb4 to fully support modern Unicode): [1, 2, 3, 4, 5]
php
// Example for PDO
$pdo = new PDO("mysql:host=$host;dbname=$db;charset=utf8mb4", $user, $pass);
Używaj kodu z rozwagą.
Are you planning to upgrade an old legacy system, or are you encountering garbled text/blank outputs after an environment switch? Let me know your exact scenario so I can provide targeted migration fixes!
Sponsi zmienił(a) swoje zdjęcie profilowe