🔍 HasExtension

Checks whether the specified extension is installed in the current PHP environment.

When to use

Use this for pre-checks before running features that depend on a certain extension, or to assert in CI that required extensions (such as pdo, mbstring) are installed.

Signature

func (c *Composer) HasExtension(extension string) (bool, error)

Parameters

Parameter	Type	Description
extension	string	The PHP extension name to check, e.g. mbstring or pdo

Return value

• bool: true if the extension is installed, otherwise false
• error: Returns an error when fetching the extension list fails

Example

package main

import (
    "fmt"
    "log"

    "github.com/scagogogo/composer-skills/pkg/composer"
)

func main() {
    comp, err := composer.New(composer.DefaultOptions())
    if err != nil {
        log.Fatal(err)
    }

    hasJSON, err := comp.HasExtension("json")
    if err != nil {
        log.Fatalf("Failed to check extension: %v", err)
    }

    if hasJSON {
        fmt.Println("json extension installed")
    } else {
        fmt.Println("json extension not installed")
    }
}

Advanced

• This method internally calls GetExtensions and does an exact match
• To check with a version constraint, use IsPlatformAvailable
• When checking a large batch, call GetExtensions once and iterate yourself to avoid repeatedly executing the command