上传文件时在PHP中用下划线替换空格答案

【问题标题】：Replace spaces with an underscore in PHP while uploading file上传文件时在PHP中用下划线替换空格
【发布时间】：2017-11-17 01:17:40
【问题描述】：

我有一个允许用户上传图片的脚本。我正在研究从图像集合中抓取随机图像的东西，但是空格似乎与 url 搞砸了，这意味着我需要弄清楚如何用 _s 替换空格。

<?php
$target_dir = "images/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        $target_file = str_replace(' ', '_', $target_file);
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}

正如您在此处看到的，我尝试添加 $target_file = str_replace(' ', '_', $target_file;) 来替换字符串，但是上传的图像仍然带有空格。我怎样才能使这项工作？

【问题讨论】：

您在实际使用后更改 $target_file 字符串 -- 所以它不会起作用也就不足为奇了

标签： php

【解决方案1】：

因为你上传后替换了，你应该在上传前替换。

<?php
$target_dir = "images/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
    $target_file = str_replace(' ', '_', $target_file);
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}

【讨论】：

【解决方案2】：

在您的代码中，仅替换文件名字符串的内容。

它不会改变实际的文件名。

你需要在move_uploaded_file之前使用str_replace。

【讨论】：

【解决方案3】：

你的代码应该是：

<?php
$target_dir = "images/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
    // if everything is ok, try to upload file
} else {
    $target_file = str_replace(' ', '_', $target_file);
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"],  $target_file)) {
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}

【讨论】：