php開發常用函數總結

php開發常用函數總結

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10http_build_query()

<?php

$data = array(foo=>bar,

baz=>boom,

cow=>milk,

php=>hypertext processor);

echo http_build_query($data);

foo=bar&baz=boom&cow=milk&php=hypertext+processor

?>

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23mktime()

<?php

// 輸出：October 3, 1975 was on a Friday

echo "Oct 3, 1975 was on a ".date("l", mktime(0,0,0,10,3,1975)) . "<br><br>";

//在進行日期計算和驗證時會用到 mktime() 函數

//它會對超出範圍的輸入值自動計算正確的值：

echo date("M-d-Y",mktime(0,0,0,12,36,2001)) . "<br>";

echo date("M-d-Y",mktime(0,0,0,14,1,2001)) . "<br>";

echo date("M-d-Y",mktime(0,0,0,1,1,2001)) . "<br>";

echo date("M-d-Y",mktime(0,0,0,1,1,99)) . "<br>";

?>

Oct 3, 1975 was on a Friday

Jan-05-2002

Feb-01-2002

Jan-01-2001

Jan-01-1999

$today=mktime(0,0,0,date(m),date(d),date(Y));

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10mb_strlen

<?php

//測試時文件的編碼方式要是UTF8

$str=中文a字1符;

echo strlen($str).<br>;//14

echo mb_strlen($str,utf8).<br>;//6

echo mb_strlen($str,gbk).<br>;//8

echo mb_strlen($str,gb2312).<br>;//10

?>

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12strip_tags()

<?php

$text = <p>Test paragraph.</p><!-- Comment --> <a href="#fragment">Other text</a>;

echo strip_tags($text);

echo " ";

// 允許 <p> 和 <a>

echo strip_tags($text, <p><a>);

?>

Test paragraph. Other text

<p>Test paragraph.</p> <a href="#fragment">Other text</a>

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11array_push()

<?php

$a=array();

array_push($a,"blue","yellow");

print_r($a);

?>

Array

(

[0] => blue

[1] => yellow

)

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14array_merge()

<?php

$a1=array("red","green");

$a2=array("blue","yellow");

print_r(array_merge($a1,$a2));

?>

Array

(

[0] => red

[1] => green

[2] => blue

[3] => yellow

)

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5mb_substr()

<?php

$aaa = "this這是中文字元串";

echo mb_substr($aaa,0,6,UTF-8);//輸出值為: this這是

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4strtotime

<?php

echo strtotime(date("Y-m-d",time())); //1483632000

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14intval() floatval() strval()

<?php

$str="123.9abc";

$int = intval($str);

var_dump($int);

$float = floatval($str);

var_dump($float);

$str=strval($str);

var_dump($str);

?>

int(123)

float(123.9)

string(8) "123.9abc"

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