search
HomeBackend DevelopmentPHP ProblemHow to extract the first few characters of a string in php

php method to extract the first few digits of a string: You can use the substr() function to extract. This function can return the extracted part of the string, return false if it fails, or return an empty string, such as [substr($str, 0, 3);].

How to extract the first few characters of a string in php

The substr() function returns the extracted portion of the string, FALSE if failed, or an empty string.

(Recommended tutorial: php graphic tutorial)

Syntax:

substr(string,start,length)

Parameters:

string Required. Specifies a part of the string to be returned.

start Required. Specifies where in the string to begin.

length Optional. Specifies the length of the string to be returned. The default is until the end of the string.

(Learning video recommendation: php video tutorial)

Implementation code:

<?php 
$str = "123456789";
echo substr($str , 0 , 3);//从左边第一位字符起截取3位字符:结果:123
echo substr($str , 3 , 3);//从左边第3位字符起截取3位字符:结果:456
?>

The above is the detailed content of How to extract the first few characters of a string in php. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment