php How to determine whether the linux file path exists: 1. Use the linux command "[ -f qipa250.txt ] && echo yes || echo no" to determine whether the file exists; 2. Call the linux command through php. The code is "$pdf_file_exists = '[ -f ' . $pdf_file_url . ' ] && echo true || echo false';".
The operating environment of this tutorial: linux5.9.8 system, PHP8.1, Dell G3 computer.
php uses linux commands to determine whether the file exists
Linux command to determine whether the file exists
[ -f qipa250.txt ] && echo yes || echo no
-f File name is true if the file exists .
If [-f qipa250.txt] is true, echo yes will be executed. Echo no will no longer be executed due to the existence of the or statement ||.
It is important to note that the logic and logic here may be worthy of careful consideration.
php calls linux command method
//指定文件路径 $pdf_file_url='/data/web/QipaFile/qipa250.pdf'; //命令 $pdf_file_exists = '[ -f ' . $pdf_file_url . ' ] && echo true || echo false'; //执行 echo $pdf_file_exists_result = system($pdf_file_exists);
Recommended learning: "PHP Video Tutorial"
The above is the detailed content of How to determine whether the php linux file path exists. 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

SublimeText3 Linux new version
SublimeText3 Linux latest version

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
