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POwhat is the point of escaping quotation marks in php
 

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    <p>Here is a validation script from a book I am learning, Why is escaping the quotation marks necassery? e.g. <code>&lt;option value=\"char\"&gt;char&lt;/option&gt;</code></p> <pre><code>&lt;?php //validate important input if ((!$_POST[table_name]) || (!$_POST[num_fields])) { header( "location: show_createtable.html"); exit; } //begin creating form for display $form_block = " &lt;form action=\"do_createtable.php\" method=\"post\"&gt; &lt;input name=\"table_name\" type=\"hidden\" value=\"$_POST[table_name]\"&gt; &lt;table cellspacing=\"5\" cellpadding=\"5\"&gt; &lt;tr&gt; &lt;th&gt;Field Name&lt;/th&gt;&lt;th&gt;Field Type&lt;/th&gt;&lt;th&gt;Table Length&lt;/th&gt; &lt;/tr&gt;"; //count from 0 until you reach the number fo fields for ($i = 0; $i &lt;$_POST[num_fields]; $i++) { $form_block .=" &lt;tr&gt; &lt;td align=center&gt;&lt;input type=\"texr\" name=\"field name[]\" size=\"30\"&gt;&lt;/td&gt; &lt;td align=center&gt; &lt;select name=\"field_type[]\"&gt; &lt;option value=\"char\"&gt;char&lt;/option&gt; &lt;option value=\"date\"&gt;date&lt;/option&gt; &lt;option value=\"float\"&gt;float&lt;/option&gt; &lt;option value=\"int\"&gt;int&lt;/option&gt; &lt;option value=\"text\"&gt;text&lt;/option&gt; &lt;option value=\"varchar\"&gt;varchar&lt;/option&gt; &lt;/select&gt; &lt;/td&gt; &lt;td align=center&gt;&lt;input type=\"text\" name=\"field_length[]\" size=\"5\"&gt; &lt;/td&gt; &lt;/tr&gt;"; } //finish up the form $form_block .= " &lt;tr&gt; &lt;td align=center colspan=3&gt;&lt;input type =\"submit\" value=\"create table\"&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;/form&gt;"; ?&gt; &lt;html&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt; &lt;title&gt;Create a database table: Step 2&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;h1&gt;defnie fields for &lt;? echo "$_POST[table_name]"; ?&gt; &lt;/h1&gt; &lt;? echo "$form_block"; ?&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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