PHP

PHP.note.md

もろもろ

文字数とか

• PHPでの文字列の文字数・バイト数・文字幅（見た目の長さ）の数え方

全角チェック

<?php
    /**
     * @assert ('文字列です。') === true
     * @assert ('abcd1234+:;!') === false
     * @assert ('全角abcd') === false
     * @assert ('半角ｶﾅ') === false
     */
    function is_zen_preg_match ($str) {
        if (!preg_match("/(?:\xEF\xBD[\xA1-\xBF]|\xEF\xBE[\x80-\x9F])|[\x20-\x7E]/", $str)) {
            return true;
        } else {
            return false;
        }
    }

名前でメソッドを呼ぶ

<?php

class Checker {
    function check_name($value) {
        return false;
    }
}

$profile = array(
    'name' => 'my name',
    'phone' => '333-3333-3333'
);

$checker = new Checker();

function check($checker, $key, $value ){
    $method = "check_$key";
    if(method_exists($checker, $method)){
        return $checker->$method($value);
    }
    return true;
}

foreach($profile as $key => $value ){
    echo $key, ":", check($checker, $key, $value ), "\n";
}

map関数

<?php

$array = array('a' => 1, 'b' => 2, 'c' => 3);

$array2 = array_map(function($val){ return $val * 2 ; }, $array);

foreach($array as  $k => $v ){
    echo "$k .... $v\n";
}

foreach($array2 as  $k => $v ){
    echo "$k .... $v\n";
}

$ php tests_map.php
a .... 1
b .... 2
c .... 3
a .... 2
b .... 4
c .... 6

インスタンスクラスのstatic メンバーへのアクセス

$model_class = get_class($instance);
$value = $model_class::$static_value;

配列要素の削除

unset($array[$i]);

• PHP docs
• PHP: Noticeエラーを回避してarrayから値を取得するいくつかの例

mysql

-接続確認

# /vagrant/php/vendor/bin/psysh
Psy Shell v0.5.2 (PHP 5.5.27 ― cli) by Justin Hileman
>>> (new mysqli('localhost', 'root', 'password'))->query('show databases')->fetch_all();

error

• php.ini

display_errors = on
error_reporting = E_ALL

templates

TOP 5 PHP TEMPLATE ENGINES

• Mustache
• Blade Haml / Jadeインスパイア (Laravel)
• Smarty
• Twig Jinjaインスパイア (Symfony)
• Volt Jinjaインスパイア (Phalcon)

php.vs.md

Python

• Python: an introduction for PHP (and other) programmers
• re.search
• PHP parser written in Python using PLY

trouble.md

PHP Warning: Unknown: It is not safe to rely on the system's timezone settings.

PHP Warning:  Unknown: It is not safe to rely on the system's timezone settings. 
You are *required* to use the date.timezone setting or the date_default_timezone_set() function.

In case you used any of those methods and you are still getting this warning, 
you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, 
but please set date.timezone to select your timezone. in Unknown on line 0

 # grep timezone $(phpenv prefix)/etc/php.ini
 ; Defines the default timezone used by the date functions
 ; http://php.net/date.timezone
 ;date.timezone =

# vim $(phpenv prefix)/etc/php.ini

# grep timezone $(phpenv prefix)/etc/php.ini
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
;date.timezone =
date.timezone = Asia/Tokyo

xdebug.install.md

xdebug

• https://github.com/derickr/xdebug

ソースインストール

# cd $(phpenv root)
$ mkdir src && cd src
# git clone https://github.com/derickr/xdebug.git
Initialized empty Git repository in /root/.anyenv/envs/phpenv/src/xdebug/.git/
remote: Counting objects: 14485, done.
remote: Total 14485 (delta 0), reused 0 (delta 0), pack-reused 14485
Receiving objects: 100% (14485/14485), 6.36 MiB | 732 KiB/s, done.
Resolving deltas: 100% (8790/8790), done.


# cd xdebug/

# phpize
Configuring for:
PHP Api Version:         20121113
Zend Module Api No:      20121212
Zend Extension Api No:   220121212

# which php-config
/root/.anyenv/envs/phpenv/shims/php-config

# ./configure --enable-xdebug

# make

# find . -name "*.so" -print
./.libs/xdebug.so
./modules/xdebug.so

• php cli additional .ini files not loaded

phpenv install でインストールされてた

# cd $(phpenv root)/versions/5.6.11
# more etc/conf.d/xdebug.ini
zend_extension="/root/.anyenv/envs/phpenv/versions/5.6.11/lib/php/extensions/no-debug-non-zts-20131226/xdebug.so"

# ls -al /root/.anyenv/envs/phpenv/versions/5.6.11/lib/php/extensions/no-debug-non-zts-20131226
合計 2648
drwxr-xr-x 2 root root    4096  8月  6 15:36 2015 .
drwxr-xr-x 3 root root    4096  8月  6 15:36 2015 ..
-rwxr-xr-x 1 root root 1104832  8月  6 15:36 2015 opcache.a
-rwxr-xr-x 1 root root  586944  8月  6 15:36 2015 opcache.so

データベース

• PHPでデータベースに接続するときのまとめ