Question

在PHP中学习正则表达式。这是我的代码：

  <SolidColorBrush x:Key="ProgressBarBackgroundBrush" Color="Gray" />
  <SolidColorBrush x:Key="ProgressBarTrackBackgroundBrush" Color="#105295" />
  <Style x:Key="{x:Type ProgressBar}" TargetType="{x:Type ProgressBar}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ProgressBar}">
                        <controls:RoundBorder x:Name="BorderBackground" CornerRadius="3" BorderThickness="0"
                        BorderBrush="{StaticResource ProgressBarBorderBrush}"
                        Background="{StaticResource ProgressBarBackgroundBrush}">
                            <Grid>
                                <VisualStateManager.VisualStateGroups>
                                    <VisualStateGroup x:Name="CommonStates">
                                        <VisualState x:Name="Determinate" />
                                        <VisualState x:Name="Indeterminate" />
                                    </VisualStateGroup>
                                </VisualStateManager.VisualStateGroups>
                                <Border x:Name="PART_Track" Margin="0" BorderThickness="0" CornerRadius="3"  />
                                <Border x:Name="PART_Indicator" Margin="0" BorderThickness="0" CornerRadius="3" HorizontalAlignment="Left"
                                Background="{StaticResource ProgressBarTrackBackgroundBrush}" ClipToBounds="True">
                                    <Border x:Name="DiagonalDecorator" Width="5000">
                                        <Border.Background>
                                            <DrawingBrush  TileMode="Tile" Stretch="None" Viewbox="0,0,1,1" Viewport="0,0,36,34"  ViewportUnits="Absolute">
                                                <DrawingBrush.RelativeTransform>
                                                    <TranslateTransform X="0" Y="0" />
                                                </DrawingBrush.RelativeTransform>
                                                <DrawingBrush.Drawing>
                                                    <GeometryDrawing Brush="#156dc7" Geometry="M0,0 18,0 36,34 18,34 Z" />
                                                </DrawingBrush.Drawing>
                                            </DrawingBrush>
                                        </Border.Background>
                                        <Border.Triggers>
                                            <EventTrigger RoutedEvent="FrameworkElement.Loaded">
                                                <BeginStoryboard>
                                                    <Storyboard>
                                                        <DoubleAnimation Storyboard.TargetProperty="(Border.Background).(DrawingBrush.RelativeTransform).(TranslateTransform.X)"
                                                    From="0" To=".36" RepeatBehavior="Forever" Duration="0:0:18" />
                                                    </Storyboard>
                                                </BeginStoryboard>
                                            </EventTrigger>
                                        </Border.Triggers>
                                    </Border>
                                </Border>
                            </Grid>
                        </controls:RoundBorder >
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

我有一个带衬里的文本，每一行都以nubmer开头，例如：

 header('Content-type: text/plain; charset=utf-8');
 $lines = file('datatest.txt');
 $lines = preg_grep("/word/", $lines); //finds words that I need, including numbers
 $lines = preg_replace('/\d/', '', $lines); //replaces all numbers with ''
 foreach ($lines as $name) {
    echo "$name";
}

删除了数字，但逗号停留，现在看起来像这样：

1.1. Name
2.0. Name2
2.3. Name3

谢谢！

Answer 1

您可以使用：

$lines = preg_replace('/[\d.]+/', '', $lines); //replaces all numbers with ''

Answer 2

试试这个：这将仅从字符串

的开头删除数字和点

$lines = preg_replace('/^\s*[\d\.]+/', '', $lines);

正则表达式PHP删除所有浮点数

2 个答案: