How to check if a file exists in php

How to query whether a file exists in php: Use the built-in function [file_exists] to determine whether the file exists. The code is [if(file_exists($file)){echo "In the current directory, file".$file ."exist"}】.

How to query whether a file exists in php:

There are built-in functions to determine whether a file or directory exists

file_exists:Whether the file exists

$file = "check.txt";
if(file_exists($file))
{
    echo "当前目录中，文件".$file."存在";
}
else
{
     echo "当前目录中，文件".$file."不存在";
}

is_dir:Whether the directory exists

$dir = "c:/datacheck";
if(is_dir($dir))
{
    echo "当前目录下，目录".$dir."存在";
}
else
{
     echo "当前目录下，目录".$dir."不存在";
}

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