[PHP]Creating instance of dynamic class

```php $classPath = \explode(“\”, NAMESPACE); \array_pop($classPath); $newPath = \implode(“\”, $classPath) . “\Drivers\”; $className = $newPath . Str::studly($this->driver); if (!\class_exists($className)) { throw new DriverException(‘Could not find driver’); }

[SQL] Deleting and updating data from multiple related tables(On Delete)

On Delete

• Set null
• Cascade
• No action
• Restricct

PHP Bitmask

```php const FLAG_1 = 0b0001; // 1 const FLAG_2 = 0b0010; // 2 const FLAG_3 = 0b0100; // 4 const FLAG_4 = 0b1000; // 8 // Can you see the pattern? ;-)

Task flow chat

```mermaid graph TB

Simple Store

Element

PHP-ML Apriori example

Initial

PHP natural Language Processing Tools

Classification Models

PHP Machine Learning Algorithms

• Association rule learning
  • Apriori (Chinese) (Example)
• Classification
  • SVC
  • k-Nearest Neighbors (Chinese)
  • Naive Bayes
  • Decision Tree (CART)
  • Ensemble Algorithms
    • Bagging (Bootstrap Aggregating)
    • Random Forest
    • AdaBoost
  • Linear
    • Adaline
    • Decision Stump
    • Perceptron
    • LogisticRegression
• Regression
  • Least Squares
  • SVR
• Clustering
  • k-Means
  • DBSCAN
  • Fuzzy C-Means
• Metric
  • Accuracy
  • Confusion Matrix
  • Classification Report
• Workflow
  • Pipeline
• Neural Network
  • Multilayer Perceptron Classifier
• Cross Validation
  • Random Split
  • Stratified Random Split
• Feature Selection
  • Variance Threshold
• Preprocessing
  • Normalization
  • Imputation missing values
• Feature Extraction
  • Token Count Vectorizer
  • Tf-idf Transformer
• Dimensionality Reduction
  • PCA (Principal Component Analysis)
  • Kernel PCA
  • LDA (Linear Discriminant Analysis)
• Datasets
  • Array
  • CSV
  • Files
  • Ready to use:
    • Iris
    • Wine
    • Glass
• Models management
  • Persistency
• Math
  • Distance
  • Matrix
  • Set
  • Statistic
  • Linear Algebra

Machine Learning Frameworks

Global space

In PHP, the global space refers to the highest level of the PHP namespace hierarchy. It is also known as the global scope or global namespace. When you define variables, functions, classes, or constants outside of any namespaces, they are considered to be part of the global space.