获取 PHP 代码以识别特殊字符

Question

我有这个文本模拟器，允许访问者选择他们想要的特定字体和他们想要的行数。此功能类似于 ThingsRemembered.com 上的预览，因此您可以在购买前查看商品的外观。它运行良好，但是某些特殊字符在模拟器中不起作用。这些如下：

# - Does not appear
& - truncates this and anything after it
+ - Does not appear
\ - Does not appear
' - Erases entire line

我想我需要转义这些字符并替换为它们的 HTML 友好等价物；有没有人有一个如何做到这一点的例子？

<?php
//creates a image handle
$image = imagecreate( 700, 70 );

if(!empty($_GET["bgcolor"])){
$background = imagecolorallocate( $image,0, 0, 0);
}

else {
$background = imagecolorallocate( $image,255, 255, 255);
}

//GET COLORS FROM POST AND SPLIT INTO RGB FORMAT
$color  =  $_GET["color"];
$pieces = explode("-", $color);
 //COLORS
$color = imagecolorallocate($image, hexdec("0x".$pieces[0].""), hexdec("0x".$pieces[1].""),  hexdec("0x".$pieces[2].""));


$font = 'fonts/'.$_GET["font"].'';
$fontSize = "25";
$fontRotation = "0";
$str = utf8_encode_mix($_GET["name"]);

// char code replacements

$tb = imagettfbbox(25, 0, $font, $str);

$x = ceil((700 - $tb[2]) / 2);

ImageTTFText($image, $fontSize, $fontRotation, $x, 50, $color, $font, $str);

header("Content-Type: image/PNG");
ImagePng ($image);
imagedestroy($image);

    function utf8_encode_mix($input, $encode_keys=false)
    {
        if(is_array($input))
        {
            $result = array();
            foreach($input as $k => $v)
            {                
                $key = ($encode_keys)? utf8_encode($k) : $k;
                $result[$key] = utf8_encode_mix( $v, $encode_keys);
            }
        }
        else
        {
            $result = utf8_encode($input);
        }

        return $result;
    }
?>

通过将来自调用 PHP 页面的文本传递到此 PHP 代码来解析用户输入。输入字符串作为查询字符串变量传递给此例程；这不是我的设计，而是我继承的东西。

Answer 1

使用

# 你想要一个#

& 你想要 &

+ 你想要一个 +

\ 你想要一个 \

Answer 2

可以使用以下PHP进行转换：

$html = '&#'.ord('#').';';

ord函数将字符转换为ASCII码（数字）。您可以在此处找到 ASCII 字符列表及其数值：http://www.asciitable.com/

一个转换所有特殊字符的函数:

function convertSpecialToHTML($char) {
    $special = ['#', '&', '+', '\'];

    if (in_array($char, $special)) {
        return '&#'.ord($char).';';
    } else {
        return $char;
    }
}

demo: http://ideone.com/vGNZ5e

你也应该看看 htmlentities:

echo htmlentities("I'm a string with all your special characters: \ + & #", ENT_HTML5);
//I'm a string with all your special characters&colon; &bsol; &plus; &amp; &num;

Answer 3

特别感谢用户@dorad 帮助我使它正常工作。这是实际工作的代码。我怀疑我的原始版本是为 PHP 的早期版本编码的，它无法在较新的 PHP 版本中正确处理特殊字符。因此，事不宜迟，这是最终有效的代码：

<?php
//creates a image handle
$image = imagecreate( 700, 70 );

if(!empty($_POST["bgcolor"])){
$background = imagecolorallocate( $image,0, 0, 0);
}

else {
$background = imagecolorallocate( $image,255, 255, 255);
}

//GET COLORS FROM POST AND SPLIT INTO RGB FORMAT
$color  =  $_POST["color"];
$pieces = explode("-", $color);
 //COLORS
$color = imagecolorallocate($image, hexdec("0x".$pieces[0].""), hexdec("0x".$pieces[1].""),  hexdec("0x".$pieces[2].""));


$font = 'fonts/'.$_POST["font"].'';
$fontSize = "25";
$fontRotation = "0";
$str = utf8_encode_mix($_POST["name"]);

$regex = $str;
$replaced = preg_replace($regex,"%26",$str);


$tb = imagettfbbox(25, 0, $font, $str);
$x = ceil((700 - $tb[2]) / 2);

ImageTTFText($image, $fontSize, $fontRotation, $x, 50, $color, $font, $str);

header("Content-Type: image/PNG");
ImagePng ($image);
imagedestroy($image);

    function utf8_encode_mix($input, $encode_keys=false)
    {
        if(is_array($input))
        {
            $result = array();
            foreach($input as $k => $v)
            {                
                $key = ($encode_keys)? utf8_encode($k) : $k;
                $result[$key] = utf8_encode_mix( $v, $encode_keys);
            }
        }
        else
        {
            $result = utf8_encode($input);
        }

        return $result;
    }
?>

调用页面index2.php

<div style="padding:00px;">

<strong>Please complete this form to preview the font and color font your name Embroidery: </strong>
<br><br>


<form action="index2.php?page=embroidery" method="post" name="font" style="background-color:#EDFAFC;">

<input name="page" type="hidden" value="lab_coats_embroidery">
<?
function checkcolor ($color) {

if($color == $_POST["color"]){
    echo "checked";
}
}

//
?>


<table width="600" border="0" cellspacing="4" cellpadding="4">
  <tr>
    <td width="163">Please enter your name: </td>
    <td width="398">Line 1:
      <input name="name" type="text" value="<?=$_POST["name"]?>" size="40">
      <br />
      Line 2:
      <input name="name2" type="text" value="<?=$_POST["name2"]?>" size="40" />
<br />
      Line 3:
      <input name="name3" type="text" value="<?=$_POST["name3"]?>" size="40" /></td>
    <td width="18">&nbsp;</td>
    <td width="21">&nbsp;</td>
  </tr>
  <tr>
    <td>Please select a font: </td>
    <td><select name="font" id="font">
     <option value="<?=$_POST["font"]?>"></option>
      <option value="brush">Brush script size 14</option>
      <option value="athletic">Athletic swoosh</option>
      <!--<option value="diana">Diana script</option>-->
      <option value="brush738">Brush 738</option>
      <option value="helvetica">Helvetica narrow</option>
      <option value="homeward">Homeward</option>
      <option value="cheltenham">Cheltenham</option>
      <option value="athletic_narrow">Athletic Narrow</option>
      <option value="courier">Courier</option>
<?php /*?>      <option value="cancun">Cancun</option><?php */?>
    </select>
      Color:
      <select name="color" id="color">
        <option value="<?=$_POST["color"]?>"></option>
        <option value="00-00-00">Black</option>
        <option value="cc-00-00">Red</option>
        <option value="05-34-92">Royal Blue</option>
        <option value="13-2c-61">Navy</option>
        <option value="86-00-41">Burgundy</option>
        <option value="fd-08-c8">Fuchsia</option>
        <option value="73-b9-ff">Sky Blue</option>
        <option value="02-74-8c">Teal</option>
        <option value="02-4b-2d">Forest Green</option>
        <option value="43-07-71">Purple</option>
        <option value="ff-c6-00">Gold</option>
        <option value="dd-dd-dd">Silver</option>
        <option value="96-54-31">Bronze</option>
      </select></td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <td>&nbsp;</td>
    <td><input type="submit" name="button" id="button" value="Preview My Name" /></td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
</table>
</form>

<div style="text-align:center;">
<!-- orig setting height 65px and no background positioning -->
<div style="background-image:url('dpimage.php?name=<?=$_POST["name"]?>&font=<?=$_POST["font"]?>&color=<?=$_POST["color"]?>'); background-repeat:no; background-position: center -20px; width:700px; height:40px;"></div>
<div style="background-image:url('dpimage.php?name=<?=$_POST["name2"]?>&font=<?=$_POST["font"]?>&color=<?=$_POST["color"]?>'); background-repeat:no; background-position: center -20px; width:700px; height:40px;"></div>
<div style="background-image:url('dpimage.php?name=<?=$_POST["name3"]?>&font=<?=$_POST["font"]?>&color=<?=$_POST["color"]?> '); background-repeat:no; background-position: center -20px; width:700px; height:40px;"></div>

</div>

</div>

获取 PHP 代码以识别特殊字符

Getting PHP code to recognize special characters

php

special-characters

truncated