PHP quotemeta() 函数

PHP String ပုံစံ

实例

预定义字符前添加反斜杠：

<?php
str = "Hello world. (can you hear me?)";
echo quotemeta($str);
?>

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Definition and usage

quotemeta() function adds a backslash before some predefined characters in a string.

Predefined characters：

  • Period (.)
  • Backslash (\)
  • Plus (+)
  • Asterisk (*)
  • Question mark (?)
  • Square brackets ([ ])
  • Tilde (^)
  • Dollar sign ($)
  • Parentheses ()

Tip：This function can be used to escape special characters, such as ( ) in SQL, [ ] and * .

Note：This function is binary safe.

Syntax

quotemeta(string)
Parameter Description
string Required. Specify the string to be checked.

Technical details

Return value： Return the string of the referenced meta character.
PHP version： 4+

More examples

Example 1

Multiple predefined characters before adding backslash：

<?php
$str1 = "1 + 1 = 2";
$str2 = "1 * 1 = 1";
$str3 = "Could you borrow me 5$?";
$str4 = "Are you not e&";
$str5 = "The caret [ ^ ] Looks like a hat!";
echo quotemeta($str1)."<br>";
echo quotemeta($str2)."<br>";
echo quotemeta($str3)."<br>";
echo quotemeta($str4)."<br>";
echo quotemeta($str5)."<br>";
?>

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PHP String ပုံစံ