如果要从一开始就删除多余的空格，请ltrim()在PHP中使用。假设以下是我们的变量-
$value=" Hello, welcome to PHP Tutorial ";
我们想要左侧没有空白的输出-
Hello, welcome to PHP Tutorial
<!DOCTYPE html> <html> <body> <?php $value=" Hello, welcome to PHP Tutorial "; print_r( "The actual value is=".$value."<br>"); echo "The actual length is=",strlen($value)."<br>"; $modifiedValue=ltrim($value); echo "After removing extra whitespace from beginning=",strlen($modifiedValue)."<br>"; echo "The result is=".$modifiedValue; ?> </body> </html>
输出结果
这将产生以下输出
The actual value is= Hello, welcome to PHP Tutorial The actual length is=34 After removing extra whitespace from beginning=32 The result is=Hello, welcome to PHP Tutorial