php數(shù)據(jù)字符轉(zhuǎn)義字符 php轉(zhuǎn)義字符函數(shù)

php轉(zhuǎn)義字符

用來(lái)表示一些如法輸入的字符,或者輸入后不明顯,或者容易被編輯器替換的字符。

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例如:

\r表示回車(chē)

\n表示換行

\$表示一個(gè)$符號(hào),直接在PHP的字符串里面寫(xiě)$容易被誤會(huì)為變量。

php轉(zhuǎn)義字符,斜杠、艾特符和and符

對(duì)我來(lái)說(shuō)Or the dream factory has always been the high standard, the screen exquisite detail, vivid characters vivid, touching story twists and turns, the most important thing is it in the most simple and easy to understand that the way of a token, that is - there is no shortcut to the world and Cheats, the only winning Famen is believe in themselves.

這個(gè)殺手不太冷

This film was absolutely amazing. I have spent hours re-watching various scenes and noticing all the perfection with which they are acted and directed. It's not the violence or action sequences that make this movie so great (although they are well done...), but rather moments like where Mathilda knocks on Leon's door. It would be so easy to just film the door opening, but instead we see light illuminating Natalie Portman's face, symbolizing something angelic. And the moment has so much more meaning.

請(qǐng)問(wèn)php中的轉(zhuǎn)義字符是什么 能詳細(xì)說(shuō)一下嗎

在php中:

* 以單引號(hào)為定界符的php字符串,支持兩個(gè)轉(zhuǎn)義\'和\\

* 以雙引號(hào)為定界符的php字符串,支持下列轉(zhuǎn)義:

\n 換行(LF 或 ASCII 字符 0x0A(10))

\r 回車(chē)(CR 或 ASCII 字符 0x0D(13))

\t 水平制表符(HT 或 ASCII 字符 0x09(9))

\\ 反斜線

\$ 美元符號(hào)

\" 雙引號(hào)

\[0-7]{1,3} 此正則表達(dá)式序列匹配一個(gè)用八進(jìn)制符號(hào)表示的字符

\x[0-9A-Fa-f]{1,2} 此正則表達(dá)式序列匹配一個(gè)用十六進(jìn)制符號(hào)表示的字符

舉幾個(gè)例子:

一個(gè)包含\0特殊字符的例子:

$str = "ffff\0ffff";

echo(strlen($str));

echo("\n");

for($i=0;$istrlen($str);$i++)echo("\t".ord($str{$i}));

echo("\n");

輸出結(jié)果:

----------------------

9

102 102 102 102 0 102 102 102 102

替換特殊字符的例子

$str = "ffff\0ffff";

$str = str_replace("\x0", "", $str);

//或者用$str = str_replace("\0", "", $str);

//或者用$str = str_replace(chr(0), "", $str);

echo(strlen($str));

echo("\n");

for($i=0;$istrlen($str);$i++)echo("\t".ord($str{$i}));

echo("\n");

輸出結(jié)果:

----------------------

8

102 102 102 102 102 102 102 102

八進(jìn)制ascii碼例子:

//注意,符合正則\[0-7]{1,3}的字符串,表示一個(gè)八進(jìn)制的ascii碼。

$str = "\0\01\02\3\7\10\011\08\8"; //這里的\8不符合要求,被修正為"\\8" (ascii為92和56)

echo(strlen($str));

echo("\n");

for($i=0;$istrlen($str);$i++)echo("\t".ord($str{$i}));

echo("\n");

輸出結(jié)果:

----------------------

11

0 1 2 3 7 8 9 0 56 92 56

十六進(jìn)制ascii碼例子:

$str = "\x0\x1\x2\x3\x7\x8\x9\x10\x11\xff";

echo(strlen($str));

echo("\n");

for($i=0;$istrlen($str);$i++)echo("\t".ord($str{$i}));

echo("\n");

輸出結(jié)果:

----------------------

10

0 1 2 3 7 8 9 16 17 255

PHP怎么把字符串里變成轉(zhuǎn)義字符

編碼

$new = htmlspecialchars("a href='test'Test/a", ENT_QUOTES);

echo $new; // a href='test'Test/a

解碼

$str = 'pthis - "/p';

echo htmlspecialchars_decode($str);

// note that here the quotes aren't converted

echo htmlspecialchars_decode($str, ENT_NOQUOTES);

文章題目:php數(shù)據(jù)字符轉(zhuǎn)義字符 php轉(zhuǎn)義字符函數(shù)
文章起源:http://bm7419.com/article46/ddegchg.html

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