flashKeyExists()

Signature

flashKeyExists() — returns boolean

Available in: controller Category: Flash Functions

Description

Checks if a specific key exists in the Flash.

Parameters

Name	Type	Required	Default	Description
key	string	yes	—	The key to check.

Examples

// 1. Check for an "error" key before reading it
if (flashKeyExists("error")) {
    errorMessage = flash("error");
}

// 2. Conditionally display a success notice
if (flashKeyExists("success")) {
    writeOutput(flash("success"));
}

// 3. Guard before deleting a specific flash key
if (flashKeyExists("notice")) {
    flashDelete("notice");
}