تقسيم السلاسل النصية وضمّها

explode() وimplode()

أساسيات explode()

<?php
$csv = 'Alice,Bob,Carol,Dave';

$names = explode(',', $csv);
print_r($names);
// ['Alice', 'Bob', 'Carol', 'Dave']

// Limit the number of parts
$parts = explode(',', $csv, 2);
print_r($parts);
// ['Alice', 'Bob,Carol,Dave']

implode() وjoin()

<?php
$tags = ['php', 'mysql', 'linux'];

echo implode(', ', $tags);    // php, mysql, linux
echo implode(' | ', $tags);   // php | mysql | linux
echo implode('', $tags);      // phpmysqllinux

// join() is an alias for implode()
echo join('-', $tags);  // php-mysql-linux

تحليل أسطر CSV

<?php
$line = 'Alice,"New York, NY",30';

$fields = str_getcsv($line);
print_r($fields);
// ['Alice', 'New York, NY', '30']

preg_split() — التقسيم حسب نمط

<?php
$text = 'one1two2three3four';

// Split on any digit
$parts = preg_split('/[0-9]/', $text);
print_r($parts);
// ['one', 'two', 'three', 'four']

// Split on whitespace (one or more)
$words = preg_split('/\s+/', '  hello   world  ');
print_r(array_filter($words)); // ['hello', 'world']

str_split()

<?php
$str = 'Hello';

// Split into individual characters
$chars = str_split($str);
print_r($chars); // ['H','e','l','l','o']

// Split into chunks of 2
$chunks = str_split('ABCDEF', 2);
print_r($chunks); // ['AB','CD','EF']

إنشاء سلاسل استعلام

<?php
$params = [
    'search' => 'php tutorial',
    'page'   => 2,
    'sort'   => 'date',
];

$query = http_build_query($params);
echo $query;
// search=php+tutorial&page=2&sort=date

echo '/posts?' . $query;

تحليل سلاسل استعلام

<?php
$qs = 'name=Alice&age=30&city=London';

parse_str($qs, $params);
print_r($params);
// ['name'=>'Alice', 'age'=>'30', 'city'=>'London']

// Or use parse_url + parse_str for full URLs
$url    = 'https://example.com/search?q=php&page=1';
$query  = parse_url($url, PHP_URL_QUERY);
parse_str($query, $params);
echo $params['q']; // php

استخدام implode في عبارات SQL IN

<?php
$ids = [1, 2, 3, 4, 5];
$placeholders = implode(',', array_fill(0, count($ids), '?'));

$sql = "SELECT * FROM users WHERE id IN ($placeholders)";
echo $sql;
// SELECT * FROM users WHERE id IN (?,?,?,?,?)
// Use prepared statements with these placeholders!

تحويل السلسلة النصية إلى مصفوفة كلمات

<?php
$sentence = 'The quick brown fox';
$words = explode(' ', $sentence);

$reversed = array_reverse($words);
echo implode(' ', $reversed);
// fox brown quick The

$wordCount = count($words);
echo "Word count: $wordCount"; // 4

sprintf مع نشر المصفوفة

<?php
$cols   = ['name', 'email', 'age'];
$values = ['Alice', 'alice@test.com', 30];

$colList = implode(', ', $cols);
$valPlaceholders = implode(', ', array_fill(0, count($values), '?'));

$sql = "INSERT INTO users ($colList) VALUES ($valPlaceholders)";
echo $sql;
// INSERT INTO users (name, email, age) VALUES (?, ?, ?)

تحقّق سريعًا

مراجعة: التقسيم والدمج