php笔记之:php数组相关函数的使用
<P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,Verdana,Arial,Helvetica,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">创建数组就不再说了 array()函数 <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">提取数组可以用list(). <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">测试数组元素,可以用is_array() <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">接受一个参数,传进来的变量,如果变量是数组,返回true如果不是返回false. <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">添加和删除数组元素 <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">数组的fifo和lifo <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">先解释下什么是fifo和lifo <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">删除元素与加入元素的顺序相同,称为先进先出,既first-in-first-out <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">删除元素与加入元素的顺序相反,称为后进先出,既last-in-first-out <P style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">相对应的对数组的操作 <UL style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 2em; FONT: 14px/21px 宋体,sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: #000000; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"> ,所有已有的数值键都会相应的改变,以反映在数组中的新位置,关联键不受影响.
a,[1]->b,[2]->c);
d,[1]->a,[2]->b,[3]->c);
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