php 表单空格转换

<?php
$input = "   Hello World   ";
$trimmedInput = trim($input);
echo $trimmedInput; // 输出 "Hello World"
?>

<?php
$input = "Hello   World";
$cleanedInput = preg_replace('/\s+/', ' ', $input);
echo $cleanedInput; // 输出 "Hello World"
?>

<?php
$input = "Hello World";
$replacedInput = str_replace(' ', '_', $input);
echo $replacedInput; // 输出 "Hello_World"
?>

<?php
// 确保正确获取表单数据
$input = $_POST['inputField'] ?? '';

// 使用正确的函数去除空格
$trimmedInput = trim($input);
$cleanedInput = preg_replace('/\s+/', ' ', $trimmedInput);

echo $cleanedInput;
?>