


Why Am I Getting the \'Fatal Error: [] Operator Not Supported for Strings\' in PHP 7?
Troubleshooting the "Fatal Error: [] Operator Not Supported for Strings" Issue
This fatal error arises when attempting to employ the short syntax for array push operations on a non-array variable, typically a string. Examining the provided code snippet, it's likely that one or more of the variables ($name, $date, $text, $date2) were initially defined as strings.
To correct this issue, alter the assignments within the loop to directly assign row values to these variables without creating arrays:
<code class="php">$name = $row['name']; $date = $row['date']; $text = $row['text']; $date2 = $row['date2'];</code>
PHP 7 has implemented stricter rules for array push syntax with empty indices. Variables that were previously defined as non-arrays (strings, numbers, objects) are now forbidden from using this syntax, leading to the aforementioned error.
To emphasize, these operations remain valid in PHP 7 :
<code class="php">unset($arrayWithEmptyIndices); $arrayWithEmptyIndices[] = 'value'; // Creates an array and adds an entry $array = []; // Creates an array $array[] = 'value'; // Pushes an entry</code>
However, attempts to use array push syntax on variables declared as strings, numbers, or objects will result in a fatal error:
<code class="php">$stringAsVariable = ''; $stringAsVariable[] = 'value'; $numberAsVariable = 1; $numberAsVariable[] = 'value'; $objectAsVariable = new stdclass(); $objectAsVariable[] = 'value';</code>
The above is the detailed content of Why Am I Getting the \'Fatal Error: [] Operator Not Supported for Strings\' in PHP 7?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Alipay PHP...

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

The enumeration function in PHP8.1 enhances the clarity and type safety of the code by defining named constants. 1) Enumerations can be integers, strings or objects, improving code readability and type safety. 2) Enumeration is based on class and supports object-oriented features such as traversal and reflection. 3) Enumeration can be used for comparison and assignment to ensure type safety. 4) Enumeration supports adding methods to implement complex logic. 5) Strict type checking and error handling can avoid common errors. 6) Enumeration reduces magic value and improves maintainability, but pay attention to performance optimization.

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
