function.array-column.html
10.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Return the values from a single column in the input array</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.array-chunk.html">array_chunk</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.array-combine.html">array_combine</a></div>
<div class="up"><a href="ref.array.html">Array Funktionen</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.array-column" class="refentry">
<div class="refnamediv">
<h1 class="refname">array_column</h1>
<p class="verinfo">(PHP 5 >= 5.5.0)</p><p class="refpurpose"><span class="refname">array_column</span> — <span class="dc-title">Return the values from a single column in the input array</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.array-column-description">
<h3 class="title">Beschreibung</h3>
<div class="methodsynopsis dc-description">
<span class="type">array</span> <span class="methodname"><strong>array_column</strong></span>
( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array</code></span>
, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$column_key</code></span>
[, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$index_key</code><span class="initializer"> = null</span></span>
] )</div>
<p class="para rdfs-comment">
<span class="function"><strong>array_column()</strong></span> returns the values from a single column of
the <code class="parameter">array</code>, identified by the
<code class="parameter">column_key</code>. Optionally, you may provide an
<code class="parameter">index_key</code> to index the values in the returned array by
the values from the <code class="parameter">index_key</code> column in the input
array.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.array-column-parameters">
<h3 class="title">Parameter-Liste</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">array</code></dt>
<dd>
<p class="para">
A multi-dimensional array (record set) from which to pull a column of
values.
</p>
</dd>
<dt>
<code class="parameter">column_key</code></dt>
<dd>
<p class="para">
The column of values to return. This value may be the integer key of the
column you wish to retrieve, or it may be the string key name for an
associative array. It may also be <strong><code>NULL</code></strong> to return complete arrays
(useful together with <code class="parameter">index_key</code> to reindex the
array).
</p>
</dd>
<dt>
<code class="parameter">index_key</code></dt>
<dd>
<p class="para">
The column to use as the index/keys for the returned array. This value
may be the integer key of the column, or it may be the string key name.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.array-column-returnvalues">
<h3 class="title">Rückgabewerte</h3>
<p class="para">
Returns an array of values representing a single column from the input array.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.array-column-examples">
<h3 class="title">Beispiele</h3>
<p class="para">
<div class="example" id="example-4892">
<p><strong>Beispiel #1 Get column of first names from recordset</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Array representing a possible record set returned from a database<br /></span><span style="color: #0000BB">$records </span><span style="color: #007700">= array(<br /> array(<br /> </span><span style="color: #DD0000">'id' </span><span style="color: #007700">=> </span><span style="color: #0000BB">2135</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'first_name' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'John'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'last_name' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Doe'</span><span style="color: #007700">,<br /> ),<br /> array(<br /> </span><span style="color: #DD0000">'id' </span><span style="color: #007700">=> </span><span style="color: #0000BB">3245</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'first_name' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Sally'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'last_name' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Smith'</span><span style="color: #007700">,<br /> ),<br /> array(<br /> </span><span style="color: #DD0000">'id' </span><span style="color: #007700">=> </span><span style="color: #0000BB">5342</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'first_name' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Jane'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'last_name' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Jones'</span><span style="color: #007700">,<br /> ),<br /> array(<br /> </span><span style="color: #DD0000">'id' </span><span style="color: #007700">=> </span><span style="color: #0000BB">5623</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'first_name' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Peter'</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'last_name' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'Doe'</span><span style="color: #007700">,<br /> )<br />);<br /> <br /></span><span style="color: #0000BB">$first_names </span><span style="color: #007700">= </span><span style="color: #0000BB">array_column</span><span style="color: #007700">(</span><span style="color: #0000BB">$records</span><span style="color: #007700">, </span><span style="color: #DD0000">'first_name'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$first_names</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>Das oben gezeigte Beispiel erzeugt folgende
Ausgabe:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
Array
(
[0] => John
[1] => Sally
[2] => Jane
[3] => Peter
)
</pre></div>
</div>
</div>
</p>
<p class="para">
<div class="example" id="example-4893">
<p><strong>Beispiel #2
Get column of last names from recordset, indexed by the "id" column
</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Using the $records array from Example #1<br /></span><span style="color: #0000BB">$last_names </span><span style="color: #007700">= </span><span style="color: #0000BB">array_column</span><span style="color: #007700">(</span><span style="color: #0000BB">$records</span><span style="color: #007700">, </span><span style="color: #DD0000">'last_name'</span><span style="color: #007700">, </span><span style="color: #DD0000">'id'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$last_names</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>Das oben gezeigte Beispiel erzeugt folgende
Ausgabe:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
Array
(
[2135] => Doe
[3245] => Smith
[5342] => Jones
[5623] => Doe
)
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.array-column-seealso">
<h3 class="title">Siehe auch</h3>
<p class="para">
<ul class="simplelist">
<li class="member">
<a href="https://github.com/ramsey/array_column/blob/master/src/array_column.php" class="link external">» Recommended
userland implementation for PHP lower than 5.5</a>
</li>
</ul>
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.array-chunk.html">array_chunk</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.array-combine.html">array_combine</a></div>
<div class="up"><a href="ref.array.html">Array Funktionen</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>