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PHP FAQ

php -m    # 查看已经加载的模块
php --ini # 查看配置文件
php -i    # phpinfo
php -r 'echo "Hello, World!\n";'

Timezone​

  • 默认使用 TZ 环境变量
<?php
date_default_timezone_set('Asia/Shanghai');

$script_tz = date_default_timezone_get();
if (strcmp($script_tz, ini_get('date.timezone'))){
    echo '时区与INI配置 不同';
} else {
    echo '时区与INI配置 相同'
}

php.ini

[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
; https://www.php.net/manual/en/timezones.asia.php
date.timezone = "Asia/Shanghai"

redis session​

/etc/php5/fpm/php.ini

session.save_handler = redis
# key 格式
# PHPREDIS_SESSION:j9rsgtde6st2rqb6lu5u6f4h83
session.save_path = "tcp://10.10.1.1:6379?auth=yourverycomplexpasswordhere"

强制类型​

<?
declare(strict_types=1)

Connection to `ssl://pecl.php.net:443' failed: Unable to find the socket transport "ssl" - did you forget to enable it when you configured PHP​

apk add php7-openssl

sodium_crypto_aead_aes256gcm_decrypt​

apk add php7-sodium
  • sodium_crypto_aead_aes256gcm_is_available()

Allowed memory size of 134217728 bytes exhausted (tried to allocate 65011744 bytes)​

  • php.ini
    • memory_limit=128M
<?
ini_set('memory_limit', '-1');

epoll_wait() reported that client prematurely closed connection, so upstream connection is closed too while sending request to upstream​

Declaration of Monolog\Logger must be compatible with PsrExt\Log\LoggerInterface​

apk del php82-pecl-psr
  • psr-4 已经弃用？

ZipArchive 文件名乱码​

<?php

$zip = new ZipArchive();
if ($zip->open('./test.zip') === TRUE) {
    $numFiles = $zip->numFiles;

    for ($i = 0; $i < $numFiles; $i++) {
        $statInfo = $zip->statIndex($i, ZipArchive::FL_ENC_RAW);
        $encoding = mb_detect_encoding($statInfo['name'], array("UTF-8", "GBK", "ISO-8859-1", "ASCII"));
        // CP936=GBK
        echo "Encoding: " . $encoding . PHP_EOL;
        // $filename = iconv($encoding, 'UTF-8//IGNORE', $statInfo['name']);
        // php-intl, icu
        $filename = mb_convert_encoding($statInfo['name'], 'UTF-8', $encoding);
        echo "文件名: " . $filename . PHP_EOL;
    }

    $zip->close();
} else {
    echo '无法打开 ZIP 文件';
}
  • mb_list_encodings
    • 显示所有支持的编码

Alpine iconv​

iconv(): Wrong encoding, conversion from "CP936" to "UTF-8//IGNORE" is not allowed

  • 使用 mb_convert_encoding 替代 iconv
  • PHP7.2+ 使用 icu 替代 libiconv
apk del icu-data-en   # php83-intl
apk add icu-data-full # php83-intl
# 旧版本 - 现在没有 2021 移除了 preloadable_libiconv.so
LD_PRELOAD=/usr/lib/preloadable_libiconv.so php test.php