PHP String str_pad()函數(shù)

str_pad()是內(nèi)置的PHP函數(shù)，用于填充字符串的特定長度。愛掏網(wǎng) - it200.com它返回輸入字符串在左側(cè)、右側(cè)或兩側(cè)填充到指定函數(shù)的結(jié)果。愛掏網(wǎng) - it200.com

str_pad(string,length,pad_string,pad_type)

• STR_PAD_BOTH（兩邊填充）
• STR_PAD_LEFT（左邊填充）
• STR_PAD_RIGHT（右邊填充）

注意1：如果填充字符不能被填充字符串的長度整除，則填充字符串可能會減少。愛掏網(wǎng) - it200.com

注意2：如果未指定填充類型，則默認(rèn)為STR_PAD_RIGHT。愛掏網(wǎng) - it200.com

示例1

<?php
str = "Hello Javatpoint";
echo "Your string is".str;
echo "By using str_pad() function;".str_pad($str,20,".");
?>

輸出:

Your string isHello Javatpoint
By using str_pad() function;Hello Javatpoint.....

示例2

<?php
str = "Javatpoint";
echo "Your string is:".str;
echo "<br>";
echo "By using str_pad() function:".str_pad($str,10);
?>

輸出：

Your string is:Javatpoint
By using str_pad() function:Javatpoint

示例3

<?php
str = "Hello Javatpoint";
echo "Your string is".str;
echo "<br>";
echo "By using str_pad() function:".str_pad($str,20,".",STR_PAD_LEFT);
?>

輸出：

Your string isHello Javatpoint
By using str_pad() function:.....Hello Javatpoint

示例4

<?php
str = "Javatpoint";
echo "Your string is:".str;
echo "<br>";
echo "By using str_pad() function:".str_pad($str,20,".",STR_PAD_RIGHT);;
?>

輸出：

Your string is: Javatpoint
By using str_pad() function: Javatpoint............

示例5

<?php
str = "Hello Javatpoint";
echo "Your string is".str;
echo "<br>";
echo "By using str_pad() function:".str_pad($str,20,".",STR_PAD_BOTH);
?>

輸出：

Your string isHello Javatpoint
By using str_pad() function:..Hello Javatpoint..